Question Bank
USCG Exam Practice Questions
2190practice questions across twelve subject areas — Rules of the Road, Navigation, Chart Plotting, Celestial, Meteorology, Deck General, Towing, OUPV/Master, Engineering, Tankerman, Radar, and Safety. Every question has a rule or reference citation and a plain-English explanation. The built-in spaced-repetition engine schedules each question so you review what you're about to forget.
These are original practice questions written to match the exam's format, topics, and difficulty — not copies of the official NMC question database. Citations are verified against the COLREGS and CFR.
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Rules of the Road
20 of 250 free72 COLREGS and U.S. Inland Rules — conduct, steering & sailing, lights, shapes, and sound signals.
Action to Avoid — Rule 8 (1)Action to Avoid — Rule 8 Not Impede (1)Action to Avoid Collision (4)Anchored & Aground (6)Application & Demarcation Lines (7)Bridge-to-Bridge Radiotelephone (7)Day Shapes (1)Day Shapes — Aground (1)Day Shapes — Anchored (1)Day Shapes — Constrained by Draft (1)Day Shapes — Diving (1)Day Shapes — Fishing (1)Day Shapes — NUC (1)Day Shapes — RAM (1)Day Shapes — Sail & Power (1)Day Shapes — Towing (1)Distress Signals (17)Fishing Vessels (6)General & Definitions (9)Inland Lights Differences (8)Inland-Specific Provisions (11)Light Arcs — Masthead (1)Light Arcs — Sidelights (1)Light Arcs — Sternlight (1)Light Configuration — Second Masthead (1)Light Definitions & Visibility (7)Light Identification — Aground (1)Light Identification — Constrained by Draft (1)Light Identification — Fishing (other) (1)Light Identification — NUC (1)Light Identification — Pilot (1)Light Identification — RAM (1)Light Identification — Sailing (1)Light Identification — Towing >200m (1)Light Identification — Trawler (1)Light Visibility — Ranges (1)Lights — Vessel Under 7m (1)Lookout — Rule 5 (1)Lookout & Safe Speed (3)Maneuvering & Warning Signals (10)Maneuvering Signals — Bend (1)Maneuvering Signals (Intent vs Action) (11)Narrow Channels & TSS (8)NUC / RAM / Constrained by Draft (10)Pilot Vessels (3)Power-Driven Vessels (5)Responsibilities — Fishing Vessel (1)Responsibilities — Rule 18 Hierarchy (1)Responsibilities — Rule 18 Sailing (1)Responsibilities Between Vessels (4)Restricted Visibility (4)Restricted Visibility — Fog Signal Heard (1)Restricted Visibility — Rule 19 (1)Restricted Visibility Signals (15)Risk of Collision (2)Risk of Collision — Rule 7 (1)Risk of Collision — Scanty Information (1)Safe Speed — Rule 6 (1)Sailing Vessels (5)Sailing Vessels — Rule 12 (1)Sailing Vessels — Same Side (1)Signals to Attract Attention (2)Sound Equipment (6)Sound Signals — Anchored Over 100m (1)Sound Signals — Doubt Signal (1)Sound Signals — RV Manned Tow (1)Sound Signals — RV NUC/RAM/Fishing/Towing (1)Sound Signals — RV Power Making Way (1)Sound Signals — RV Stopped (1)Steering & Sailing — Crossing (1)Steering & Sailing — Crossing Restriction (1)Steering & Sailing — Head-on (1)Steering & Sailing — Overtaking (1)Steering & Sailing — Overtaking Doubt (1)Steering & Sailing — Stand-on (1)Steering & Sailing Rules (16)Towing & Pushing (7)Western Rivers & Great Lakes (6)
Navigation General
20 of 250 freeDead reckoning, piloting, tides & currents, ATONs, compass correction, charts, radar, and electronic navigation.
Aids to Navigation — Bridge Marking (1)Aids to Navigation — IALA Regions (1)Aids to Navigation — Isolated Danger Mark (1)Aids to Navigation — Light Visibility (1)Aids to Navigation — RACON (1)Aids to Navigation — Range Lights (1)Aids to Navigation — Reliability (1)Aids to Navigation — Safe Water Mark (1)Aids to Navigation — Sector Lights (1)Aids to Navigation — Sound Signals (1)AIS (7)ARPA (7)Buoyage Numbering (1)Chart Accuracy (1)Chart Datums & Projections (6)Chart Symbols (5)Charts — Gnomonic Projection (1)Compass - Gyro (2)Compass - Magnetic (2)Compass - Variation (1)Compass Error (8)Currents (7)Dead Reckoning (6)Depth Sounding — Echo Sounder (1)Depth Sounding — Verifying Position (1)Deviation (4)Distance (1)ECDIS (2)ECDIS & Electronic Aids (5)Electronic Limitations (1)Electronic Nav — AIS Classes (1)Electronic Nav — AIS Data (1)Electronic Nav — Chart Datum (WGS-84) (1)Electronic Nav — DGPS/WAAS (1)Electronic Nav — DSC (1)Electronic Nav — ECDIS Overscale (1)Electronic Nav — ECDIS Safety Contour (1)Electronic Nav — ENC vs RNC (1)Electronic Nav — GPS Error Sources (1)Electronic Nav — Limitations (1)Electronic Nav — RAIM (1)Fog Navigation (1)GPS & GNSS (7)IALA Cardinal Marks (1)IALA Marks (2)Inland Marks (1)Lateral Buoyage (8)Light Characteristics (10)Light Ranges (3)Light Sectors (1)Passage Planning — Abort & Contingency (1)Passage Planning — Charts & Publications (1)Passage Planning — Contingency Anchorages (1)Passage Planning — Fix Frequency (1)Passage Planning — Four Stages (1)Passage Planning — Monitoring (1)Passage Planning — No-Go Areas (1)Passage Planning — Parallel Indexing (1)Passage Planning — Scope (1)Passage Planning — Under-Keel Clearance (1)Passage Planning — Wheel-Over (1)Piloting (2)Piloting — Clearing Bearings (1)Piloting — Danger Sounding (1)Piloting & Bearings (10)Position Plotting (1)Publications (3)Publications — Bowditch (1)Publications — Chart No. 1 (1)Publications — Coast Pilot (1)Publications — Correcting Charts (1)Publications — Light List (1)Publications — Notice to Mariners (1)Publications — Pub 117 (1)Publications — Sailing Directions (1)Publications — Tidal Current Diagrams (1)Publications & Corrections (6)Radar Aids (2)Radar Controls (2)Radar Measurement (1)Radar Plotting (3)Radar Plotting & CPA (7)Radar Principles (7)Radar Ranges (1)Relative Motion (1)Running Fix (3)Sailings — Composite Great Circle (1)Sailings — Great Circle vs Rhumb Line (1)Set & Drift (4)Soundings (1)Special Marks & Ranges (7)Tidal Currents (1)Tides (17)Time — Zone Change (1)Time — Zone Description (1)Time-Speed-Distance (5)TVMDC Conversion (10)Variation (5)Voyage Planning (1)
Chart Navigation & Plotting
20 of 240 freeNavigation problems worked on the chart — dead reckoning plots, set and drift, current sailing, the running fix, compass conversion (TVMDC), time-speed-distance, danger bearings, and estimated time of arrival.
Aids to Navigation (6)Aids to Navigation — Light Range (1)Aids to Navigation — Luminous vs Geographic Range (1)Chart Basics (7)Chart Basics — Chart Scale (1)Chart Basics — Latitude Scale for Distance (1)Chart Basics — Measuring Distance (1)Chart Basics — Scale (1)Chart Basics — Soundings and Datum (1)Chart Distance — Latitude Scale (1)Chart Scale (2)Chart Symbols (2)Chart Symbols — Compass Rose (1)Compass — Amplitude (1)Compass — Azimuth (1)Compass — Compass Error from Variation and Deviation (1)Compass — Correcting to True (1)Compass — Deviation by Range (1)Compass — TVMDC Application (1)Compass — TVMDC Uncorrecting (1)Compass & Course (5)Compass Conversion — TVMDC (2)Compass Error (4)Compass Error — Gyro (1)Compass Error — Naming (1)Danger Bearing (1)Danger Bearings (1)Dead Reckoning (5)Dead Reckoning — Plotting Rules (1)Dead Reckoning — Rules (1)Distance — Dipping a Light (1)Distance — Distance to the Horizon (1)Distance — Radar Range and Bearing (1)Distance — Vertical Sextant Angle (1)Distance Off — Bow and Beam (1)Distance Off — Bow and Beam Bearings (2)Distance Off — Doubling the Angle (1)Distance Off — Doubling the Angle on the Bow (2)Distance to Horizon (2)Distance, Speed & Time (4)Electronic — Position Accuracy (1)ETA (1)ETA Across Time Zones (1)Fixes — Best Angle of Cut (3)Fixes — Cocked Hat (3)Fixes — Distance by Two Bearings and Run (2)Fixes — LOP Definition (1)Fixes — Running Fix (2)Fixes & LOPs (7)Fixes and LOPs (3)Great Circle — Mercator Appearance (1)Great Circle Sailing (1)Leeway (3)Leeway — Effect on Track (1)Mercator Projection (2)Mercator Sailing — Meridional Parts (1)Mid-Latitude Sailing (1)Piloting — Bobbing a Light (1)Piloting — Danger Bearing (2)Piloting — Distance to Horizon (1)Piloting — Geographic Range (2)Piloting — Horizontal Danger Angle (2)Piloting — Luminous Range (1)Piloting — Vertical Danger Angle (1)Piloting — Vertical Sextant Angle (2)Plane Sailing (1)Plane Sailing — Departure (1)Plotting Conventions (2)Plotting Conventions — Labeling (3)Plotting Conventions — Symbols (3)Plotting Tools (3)Position (2)Position — Difference of Latitude (2)Position — Difference of Longitude (1)Position — Plotting Latitude and Longitude (1)Running Fix (3)Sailings (4)Sailings — Composite (1)Sailings — Course from dLat and Departure (2)Sailings — Departure (1)Sailings — Departure from dLong (1)Sailings — Distance from dLat (1)Sailings — Distance from dLat and Departure (1)Sailings — Great Circle on a Mercator (1)Sailings — Great Circle vs Rhumb Line (2)Sailings — Mid-Latitude (1)Sailings — Plane Sailing (1)Sailings — Plane Sailing Course and Distance (1)Sailings — Traverse (3)Set & Drift (3)Set & Drift — Computing Current (2)Set & Drift — Course to Steer (2)Set & Drift — Course to Steer Concept (1)Set & Drift — Definitions (1)Set & Drift — Drift Calculation (1)Set & Drift — Estimated Position (3)Set & Drift — From DR and Fix (1)Set & Drift — Speed Made Good (1)Set & Drift — Speed of Advance (2)Set & Drift — Vector Triangle (1)Set and Drift (4)Soundings (1)Special Bearings (1)Speed-Time-Distance (8)Speed-Time-Distance — 3-Minute Rule (1)Speed-Time-Distance — 6-Minute Rule (1)Speed-Time-Distance — Distance Made Good with Current (1)Speed-Time-Distance — Distance Run (2)Speed-Time-Distance — ETA (2)Speed-Time-Distance — Fuel Endurance (2)Speed-Time-Distance — Six-Minute Rule (2)Speed-Time-Distance — Speed from Run (1)Speed-Time-Distance — Three-Minute Rule (2)Speed-Time-Distance — Time to Run (3)Tidal Currents (2)Tidal Currents — Flood and Ebb (1)Tidal Currents — Interpolation (1)Tidal Currents — Rotary (1)Tidal Currents — Slack and Strength (1)Tidal Currents — Velocity Interpolation (1)Tides (9)Tides — Charted Depth (1)Tides — Clearance Under Keel (2)Tides — Depth of Water (1)Tides — Height Calculation (1)Tides — Height Interpolation (1)Tides — Rule of Twelfths (4)Tides — Semidiurnal Interval (1)Tides — Spring and Neap (1)Tides — Under-Keel Clearance (1)Tides — Vertical Clearance (3)
Celestial Navigation
20 of 190 freeTime and the Nautical Almanac, GHA/LHA and declination, the navigational triangle, sextant altitude corrections, sight reduction (HO 229/249), the running fix, amplitudes and azimuths for compass error, Polaris, and the noon sight.
Altitude Correction — Temperature/Pressure (1)Altitude Corrections — Nonstandard Conditions (2)Altitude Definitions (2)Amplitude (1)Amplitudes (1)Amplitudes — Bearing (1)Amplitudes — Compass Error (2)Amplitudes — Due East/West (1)Amplitudes — Formula (1)Assumed Position (2)Azimuth — Compass Check (1)Azimuth Angle (1)Circle of Position (2)Circle of Position — Concept (1)Compass Error (4)Coordinates (5)Coordinates — Declination (1)Coordinates — Declination and Latitude (1)Coordinates — GHA and Longitude (2)Declination (1)Equation of Time (2)Fix Quality (1)Fix Quality — Star Selection Geometry (1)Fix Quality — Symmetry (1)Great Circle (1)Hour Angle (3)Hour Angle — Aries (2)Hour Angle — GHA (1)Hour Angle — LHA (2)Hour Angle — LHA Adding 360 (1)Hour Angle — LHA East Longitude (1)Hour Angle — LHA of a Star (1)Hour Angle — LHA West Longitude (1)Hour Angle — SHA and Stars (1)Intercept Method (3)Intercept Method — Away (1)Intercept Method — Toward (1)Latitude by Polaris (1)Line of Position (1)Line of Position — Direction (1)Line of Position — Plotting (1)Longitude (1)Lower Limb vs Upper Limb (1)Meridian Altitude (3)Meridian Altitude — Contrary Name (1)Meridian Altitude — LAN Timing (2)Meridian Altitude — Latitude (2)Moon (1)Moon — Corrections (1)Navigational Triangle (5)Navigational Triangle — Vertices (1)Planets (1)Planets — Identification (1)Polaris (3)Polaris — Azimuth (2)Polaris — Latitude (2)Refraction at Horizon (1)Running Fix (2)Running Fix — Celestial (1)Sextant (1)Sextant — Adjustable Errors (2)Sextant — Artificial Horizon (1)Sextant — Non-Adjustable Errors (1)Sextant Corrections (7)Sextant Corrections — Apparent Altitude (1)Sextant Corrections — Dip (4)Sextant Corrections — Index Error (2)Sextant Corrections — Index Error Off the Arc (1)Sextant Corrections — Order (2)Sextant Corrections — Order of Application (1)Sextant Corrections — Parallax (3)Sextant Corrections — Refraction (3)Sextant Corrections — Semidiameter (2)Sextant Errors (1)Sight Reduction (5)Sight Reduction — Assumed Longitude (1)Sight Reduction — Declination Name (1)Sight Reduction — Interpolation (2)Sight Reduction — Pub 229 (1)Sight Reduction — Pub 229 vs 249 (1)Sight Reduction — Same/Contrary Name (1)Sight Reduction — Z to Zn (1)Sight Reduction — Z to Zn Northern Latitude (1)Sight Reduction — Z to Zn Southern Latitude (1)Star Identification (1)Star Identification — Pub 249 Vol 1 (2)Star Identification — Star Finder (2)Star Selection (2)Sun — Lower vs Upper Limb (1)Sun Sight Procedure (1)The Day's Work (3)The Day's Work — Sun-Run-Sun (1)The Nautical Almanac (5)The Nautical Almanac — d Correction (2)The Nautical Almanac — GHA Increments (1)The Nautical Almanac — Increments (1)The Nautical Almanac — v Correction (1)Time (3)Time — Arc to Time (2)Time — Arc to Time with Minutes (1)Time — Chronometer (1)Time — Chronometer Error (1)Time — Chronometer Rate (1)Time — GMT from Zone Time (1)Time — GMT from Zone Time (East) (1)Time — GMT from Zone Time (West) (1)Time — GMT/UT (1)Time — Time to Arc (1)Time — Watch Error (2)Time — Zone Description (2)Time — Zone Description East (1)Time — Zone Description West (1)Time — Zone Time from GMT (1)Twilight (3)Twilight — Civil Twilight (1)Twilight — Local Time of Twilight (1)Twilight — Nautical Twilight (1)Twilight — Observation Window (1)
Meteorology
20 of 140 freeThe atmosphere and pressure, global and local wind systems, air masses and fronts, clouds and precipitation, fog, tropical cyclones and the dangerous semicircle, weather instruments and observation, and basic forecasting and weather routing.
Air Masses (3)Air Masses — Classification (1)Atmosphere & Pressure (4)Barometer — Reduction (1)Barometer — Sea-Level Reduction (1)Barometer — Tendency (2)Beaufort Scale (2)Beaufort Scale — Sea State (1)Clouds (4)Clouds — Cumulonimbus (1)Clouds — Halo (1)Clouds — Indications (1)Clouds — Nimbostratus (1)Extratropical Cyclones — Life Cycle (1)Fog (4)Fog — Advection (1)Fog — Frontal/Precipitation (1)Fog — Radiation (1)Fog — Sea Smoke (1)Fog — Steam/Sea Smoke (1)Forecasting & Routing (1)Fronts (4)Fronts — Cold (1)Fronts — Cold Front Weather (1)Fronts — Stationary (1)Fronts — Warm (1)Fronts — Warm Front Cloud Sequence (1)Fronts — Warm Sector (1)Fronts — Wind Shift (1)Global Circulation (4)Global Circulation — Doldrums (1)Global Circulation — Horse Latitudes (1)Global Circulation — Trades (1)Global Circulation — Westerlies (1)GMDSS Weather — NAVTEX (1)GMDSS Weather — Radiofax (1)GMDSS Weather — SafetyNET (1)Humidity (1)Humidity — Dewpoint (1)Icing (1)Icing — Superstructure (1)Instruments (2)Instruments — Anemometer Correction (1)Instruments — Psychrometer (1)Local Winds (2)Local Winds — Katabatic (1)Local Winds — Land and Sea Breeze (1)Local Winds — Monsoon (1)Local Winds — Sea Breeze (1)Marine Warnings (1)Marine Warnings — Storm Warning (1)Marine Warnings — Thresholds (1)Observation (1)Observation — Ship Reports (2)Ocean Currents — Climate Effect (1)Ocean Currents — Weather (1)Pilot Charts (1)Pressure Systems (1)Pressure Systems — Isobars (1)Pressure Systems — Ridge and Trough (1)Pressure Systems — Ridge/Trough (1)Stability (2)Stability — Convection (1)Stability — Lapse Rate (1)Synoptic Charts — Frontal Symbols (1)Synoptic Charts — Geostrophic Wind (1)Synoptic Charts — Isobar Spacing (1)Synoptic Charts — Prognosis (1)Synoptic Charts — Surface Friction (1)Thunderstorms — Gust Front (1)Thunderstorms — Squall (1)Thunderstorms — Squall Line (1)Tropical Cyclones (7)Tropical Cyclones — 1-2-3 Rule (1)Tropical Cyclones — Avoidance (1)Tropical Cyclones — Avoidance Maneuver (1)Tropical Cyclones — Buys Ballot (1)Tropical Cyclones — Dangerous Semicircle (1)Tropical Cyclones — Early Signs (1)Tropical Cyclones — Eye and Eyewall (1)Tropical Cyclones — Formation (1)Tropical Cyclones — Recurvature (2)Tropical Cyclones — Saffir-Simpson (1)Tropical Cyclones — Semicircle (1)Tropical Cyclones — Storm Surge (1)Tropical Cyclones — Structure (1)Tropical Cyclones — Surge (1)Tropical Cyclones — Terminology (1)Visibility (1)Visibility — Categories (1)Waterspout (1)Waves — Fetch (1)Waves — Generation (1)Waves — Rogue Waves (1)Waves — Sea vs Swell (1)Waves — Significant Height (1)Waves — Significant Wave Height (1)Waves — Steepening Over Current (1)Waves — Swell (1)Weather Broadcasts — NAVTEX (1)Weather Broadcasts — SafetyNET (1)Weather Charts — Prognosis (1)Weather Routing (1)Weather Routing — OTSR (1)Wind (4)Wind — Geostrophic/Gradient (1)Wind — Veering/Backing (1)
Deck General
20 of 250 freeStability, deck seamanship, firefighting, lifesaving appliances, cargo, and federal regulations.
Anchoring (2)Anchoring — Chain Shots (1)Anchoring — Dragging (1)Anchoring — Dredging (1)Anchoring — Fouled Anchor (1)Anchoring — Holding Ground (1)Anchoring — Scope (1)Anchoring — Two Anchors (1)Anchoring — Weighing Anchor (1)Angle of Loll (5)Bilge & Pumping (1)Blocks & Purchases (4)Blocks & Tackle (2)Bridge Equipment (1)Bridge Equipment — Rudder Angle Indicator (1)Cargo — Angle of Repose (1)Cargo — Dunnage (1)Cargo — Stowage Factor (1)Cargo — Sweat & Ventilation (1)Cargo Gear & SWL (2)Cargo Handling (2)Cargo Handling & Securing (6)Centers (G, B, M, K) (5)Conning — Engine Orders (1)Conning — Helm Orders (1)Cordage & Line (7)Dangerous Cargo (IMDG) (3)Deck Maintenance (2)Deck Safety (2)Draft & Displacement (2)Enclosed Space (2)EPIRBs & Distress Signals (7)Extinguishing Agents (10)Fire Theory & Classes (10)Fixed Fire Systems (5)Free Surface Effect (6)Freeboard & Load Lines (2)Ground Tackle (2)Ground Tackle & Anchoring (5)Heaving Line (1)Helm Commands (2)Knots & Bends (6)Lifeboats & Liferafts (8)Lifesaving Drills (1)Load Lines (3)Marlinespike & Cordage (4)MARPOL Garbage (Annex V) (4)MARPOL Oil (Annex I) (4)Metacentric Height (GM) (8)Mooring — Bitts (1)Mooring — Chafe & Rats (1)Mooring — Heaving Line (1)Mooring — Line Nomenclature (1)Mooring — Self-Tensioning Winches (1)Mooring — Snap-Back (1)Mooring — Springs (1)Mooring Equipment (1)Mooring Lines (3)Mooring Operations (3)PFDs & Immersion Suits (5)Pilot Ladder (1)Pilot Transfer (1)Pollution Reporting & Regs (6)Righting Arm & GZ Curve (6)Rudder & Propeller (2)Ship Construction (3)Ship Construction — Bilge Keel (1)Ship Construction — Camber & Sheer (1)Ship Construction — Collision Bulkhead (1)Ship Construction — Deadweight (1)Ship Construction — Double Bottom (1)Ship Construction — Draft Marks (1)Ship Construction — Framing (1)Ship Construction — Freeing Ports (1)Ship Construction — Hogging & Sagging (1)Ship Construction — Panting & Pounding (1)Shiphandling — Approaching a Berth (1)Shiphandling — Backing & Filling (1)Shiphandling — Current Set Approaching a Pier (1)Shiphandling — Interaction Alongside (1)Shiphandling — Kick (1)Shiphandling — Pivot Point (1)Shiphandling — Propeller Walk (1)Shiphandling — Slow Speed Steering (1)Shiphandling — Spring Lines (1)Shiphandling — Squat Awareness (1)Shiphandling — Turning Circle (1)Shiphandling — Twin Screw (1)Shiphandling — Wind vs Current (1)Stability Definitions (8)Steering Gear (1)Survival Procedures (4)Tank Sounding (1)Trim (TPI, MT1) (6)Voyage Planning (1)Watchkeeping — Calling the Master (1)Watchkeeping — Handover (1)Watchkeeping — Hours of Rest (1)Watchkeeping — Lookout Duties (1)Watchkeeping — Standing Orders (1)Watchkeeping & Lookout (2)Watertight Integrity (2)Weight Shifts & List (6)Wire Rope (2)
Towing & Ship-Assist
20 of 190 freeTowing vessel operations — barge makeup and gear, wire rope and synthetic hawsers, towing lights and day shapes, navigation in restricted and inland waters, Subchapter M and the TSMS, articulated tug-barge units, and ship-assist and escort work.
Anchoring a Tow (1)ATB (1)ATB — Connection System (1)ATB — Heavy Weather Limit (1)ATB vs Conventional (1)Barge Lights (1)Bollard Pull (1)Bridle & Gear (2)Communications (1)Communications — Bridge-to-Bridge (1)Credentials — Apprentice Mate (Steersman) (1)Credentials — TOAR (1)Crew Safety (2)Crew Safety — Working Decks (1)Day Shapes (1)Designated Examiner (1)Emergencies (3)Emergencies — Beach Gear (1)Emergencies — Emergency Towing Connection (1)Emergencies — Girting (1)Emergencies — Parted Towline (1)Emergencies — Quick Release (1)Emergencies — Use of a Drogue (1)Emergencies — Yawing/Sheering Tow (1)Fleeting (1)Gear (1)Gear — Bollard Pull (1)Gear — Bridle and Fishplate (1)Gear — Bridle Leg Angle (1)Gear — Gob Rope (1)Gear — Norman Pin / Tow Pins (1)Gear — Pendant / Pennant (1)Gear — Pennant and Bridle (1)Gear — Shock Loading (1)Gear — Surge / Snubbing (1)Gear — Synthetic Inspection (1)Gear — Synthetic Line Snap-Back (1)Gear — Synthetic vs Wire (1)Gear — Tow Wire Stopper (1)Gear — Wire Rope Retirement (1)Gear & Makeup (5)Girting (2)Hawser & Catenary (2)Interaction (3)Interaction — Bank Effect (1)Interaction — Meeting in a Channel (1)Interaction — Shallow Water Squat (1)Interaction — Squat (1)Lights - Composite (1)Lights - Partly Submerged (1)Lights - Pushing (1)Lights — Inconspicuous Partly Submerged Tow (1)Lights — Partly Submerged Tow (1)Lights — Pushing Ahead (Inland) (1)Lights — Rigid Composite Unit (1)Lights — Towed Vessel (1)Lights — Towing Astern Length (1)Lights — Towing Astern Over 200 m (1)Makeup - Alongside (1)Makeup - Pushing (1)Makeup — Pushing Ahead (1)Makeup — Western Rivers (1)Man Overboard (1)Maneuvering (2)Maneuvering — Backing a Tow (2)Maneuvering — Flanking (Rivers) (1)Maneuvering — Girting Recovery (1)Maneuvering — Tripping / Girting Prevention (1)Narrow Channels (1)Navigation Safety — 33 CFR 164 (1)Navigation Safety — Charts and Publications (1)Operations (7)Operations — Building a Tow (Inland) (1)Operations — Connecting in a Seaway (1)Operations — Locks (1)Operations — Made-Up Push Gear (1)Operations — Making the Tow Fast (1)Operations — Night and Restricted Visibility Tow Watch (1)Operations — Notice / Voyage Planning (1)Operations — Pre-Departure Tow Inspection (1)Operations — Pre-Tow Inspection (1)Operations — Tandem and Honor Tow (1)Operations — Tandem Tow (1)Operations — Towline Length in Locks (1)Operations — Trim of the Tow (1)Operations — Weather Routing (1)Records (1)Records — Towing Vessel Record (1)Records — Towline Log (1)Restricted Visibility (1)Ship-Assist (2)Ship-Assist — Escort Speed (1)Ship-Assist — Escort Towline (1)Ship-Assist — Indirect Mode (1)Ship-Assist — Making Fast on the Hip (1)Ship-Assist — Tractor Tug (1)Ship-Assist — Working on a Hip (1)Ship-Assist & Escort (8)Sound Signals (4)Sound Signals — Manned Tow in Restricted Visibility (1)Sound Signals — Manned Tow in RV (1)Stability (1)Stability — Downflooding (1)Stability — Downflooding Angle (1)Stability — Free Surface (1)Stability — Towing Hook / Quick Release (1)Subchapter M (12)Subchapter M — Applicability (1)Subchapter M — COI Validity (1)Subchapter M — Compliance Options (2)Subchapter M — Crew Endurance / Watch (1)Subchapter M — Decal (1)Subchapter M — Designated Person (1)Subchapter M — Drills (1)Subchapter M — Drydock Exams (1)Subchapter M — Health & Safety (1)Subchapter M — Marine Casualty Reporting (1)Subchapter M — Third-Party Organization (1)Subchapter M — Towing Vessel Record (1)Subchapter M — TPO (1)Subchapter M — TSMS Audits (1)Towing Lights (8)Towline — Catenary (1)Towline — Chafe Protection (1)Towline — Length and Sea State (1)Towline — Pickup / Streaming (1)Watchkeeping (1)Watchkeeping — Crew Endurance (1)Western Rivers (3)Western Rivers — Bend Signal (1)Western Rivers — Right of Way (1)Wire Rope — Inspection (1)Wire Rope & Line (5)Wire Rope Care (1)
OUPV & 100-Ton Master
20 of 140 freeOperator of Uninspected Passenger Vessels (the 'six-pack') and Master of small vessels to 100 GRT — Subchapter C and T regulations, required equipment and manning, drug and alcohol rules, load lines and certificates, and small-craft safety and stability.
Anchoring (1)Casualty Reporting (5)Casualty Reporting — CG-2692 (1)Casualty Reporting — Reportable Events (1)Casualty Reporting — Serious Marine Incident (1)Credentials (5)Credentials — Application Form (1)Credentials — Assistance Towing (1)Credentials — Drug Test (1)Credentials — First Aid & CPR (1)Credentials — Inland Boundary (1)Credentials — Master Tonnage Tiers (1)Credentials — Medical Certificate (1)Credentials — Minimum Age (1)Credentials — MMC Validity (1)Credentials — Near-Coastal Route (1)Credentials — OUPV Definition (1)Credentials — Radar Observer (1)Credentials — Recency (1)Credentials — Sailing Endorsement (1)Credentials — Sea Service (1)Credentials — Sea Service Day (1)Credentials — STCW (1)Credentials — Suspension & Revocation (1)Credentials — TWIC (1)Credentials & Routes (9)Documents (1)Drug & Alcohol (4)Drug and Alcohol (3)Emergencies (2)Firefighting (2)Lifesaving (3)Man Overboard (1)Manning (1)Manning — Logbook/Records (1)Manning & Watches (4)Navigation (2)Navigation Safety (2)Operations (9)Operations — Alcohol Limit (1)Operations — Boating Under the Influence (1)Operations — Carbon Monoxide (1)Operations — Negligence (1)Operations — Passengers vs Persons (1)Pollution (4)Pollution — Garbage Placard (1)Pollution — Marine Sanitation Device (1)Pollution — Oil Discharge Reporting (1)Pollution — Oil Placard (1)Pollution — Plastics (1)Radio Procedures (5)Required Equipment (8)Sea Service (4)Sound Signals (1)Stability (7)Stability — Free Surface (1)Stability — Passenger Crowding (1)Subchapter T (2)Subchapter T — Applicability (1)Subchapter T — Bilge Pumping (1)Subchapter T — COI (1)Subchapter T — Drills & Familiarization (1)Subchapter T — EPIRB (1)Subchapter T — Fire Detection (1)Subchapter T — Inspections (1)Subchapter T — Lifejackets (1)Subchapter T — Passenger Limit Basis (1)Subchapter T — Stability Letter (1)Uninspected Vessels (3)Uninspected Vessels — Backfire Arrestor (1)Uninspected Vessels — Fire Extinguishers (1)Uninspected Vessels — PFDs (1)Uninspected Vessels — Ventilation (1)Uninspected Vessels — Visual Distress Signals (1)Weather (2)
Engineering
20 of 200 freeDiesel and steam plants, auxiliary machinery, refrigeration, marine electrical systems, watchkeeping, pollution prevention, and engine-room safety.
Auxiliary — Air Compressors (3)Auxiliary — Distillers (3)Auxiliary — Fresh Water Generator (1)Auxiliary — Heat Exchangers (2)Auxiliary — Pumps (7)Auxiliary — Purifier (1)Auxiliary — Purifier vs Clarifier (1)Auxiliary — Refrigeration (5)Auxiliary — Separators (2)Auxiliary — Steam Traps (2)Auxiliary — Steering Gear (2)Compressed Air — Start Air (1)Compressed Air — Two-Stage (1)Cooling — Jacket Water (1)Cooling — Thermostat (1)Diesel — Air Systems (6)Diesel — Charge Air Cooling (1)Diesel — Combustion (5)Diesel — Cooling (5)Diesel — Crankcase Safety (1)Diesel — Exhaust Temperature (1)Diesel — Flash Point (1)Diesel — Fuel (7)Diesel — Fuel Injection (3)Diesel — Governor (4)Diesel — Heavy Fuel (1)Diesel — Indicator Card (1)Diesel — Liner Wear (1)Diesel — Lubrication (5)Diesel — Maintenance (1)Diesel — Mean Effective Pressure (1)Diesel — Operating Cycle (2)Diesel — Overspeed Trip (1)Diesel — Performance (4)Diesel — Safety (3)Diesel — Scavenging (1)Diesel — Starting (3)Diesel — Troubleshooting (2)Diesel — Turbocharging (1)Diesel — Wear (2)Electrical — AVR (1)Electrical — Batteries (2)Electrical — Distribution (1)Electrical — Emergency Power (3)Electrical — Faults (2)Electrical — Generators (4)Electrical — Ground Detection (1)Electrical — Load Sharing (1)Electrical — Motors (5)Electrical — Paralleling Generators (1)Electrical — Power Factor (1)Electrical — Protection (2)Electrical — Reverse Power (1)Electrical — Shore Power (3)Electrical — Testing (2)Electrical — Theory (3)Lubrication — Oil Analysis (1)Lubrication — Viscosity (1)Pollution — MARPOL (2)Pollution — MARPOL Annex VI (1)Pollution — Oily Water Separator (1)Pollution — Records (2)Pollution — Reporting (1)Pollution — Sulfur ECA (1)Pollution — Transfer (2)Propulsion — CPP (1)Propulsion — Reduction Gear (1)Propulsion — Stern Tube (1)Pumps — Centrifugal vs PD (1)Pumps — Eductor (1)Pumps — Priming (1)Pumps — Series/Parallel (1)Refrigeration — Cycle (1)Refrigeration — Expansion Valve (1)Refrigeration — Faults (1)Safety — Bilge (2)Safety — Enclosed Space (1)Safety — Enclosed Spaces (3)Safety — Fire (2)Safety — Fixed CO2 (1)Safety — Fixed Fire Systems (2)Safety — Work Practices (2)Steam — Air Heater (1)Steam — Boiler Safety Valve (1)Steam — Boilers (6)Steam — Carryover (1)Steam — Combustion (1)Steam — Condensate (3)Steam — Feed System (2)Steam — Operations (1)Steam — Safety (4)Steam — Superheater (1)Steam — Water Level (1)Steam — Water Treatment (4)Steering Gear — Hydraulics (1)Steering Gear — Redundancy (1)Watchstanding — Bell Book (1)Watchstanding — Rounds (1)Watchstanding — Standing Orders (1)Watchstanding — STCW (2)Watchstanding — UMS (3)
Tankerman
20 of 150 freeTank vessel cargo operations — transfer procedures, the Declaration of Inspection, inert gas, flammability, static and pollution precautions, gauging, and gas-freeing.
Ballast — Segregated (1)Bonding & Static (1)Cargo — Flammable Range (1)Cargo — Flash Point (1)Cargo Grades (1)Cargo Properties — API Gravity (2)Cargo Properties — Flammable Range (1)Cargo Properties — Flash Point (1)Cargo Properties — Grades (1)Cargo Properties — RVP (2)Cargo Properties — Static Accumulator (1)Cargo Properties — Vapor Density (1)Cargo Properties — Viscosity & Heating (1)Documentation — Oil Record Book (1)Documentation — SDS (2)Equipment — Drip Pans (1)Equipment — High-Level Alarm (2)Equipment — Hoses (2)Equipment — Overfill Alarm (1)Equipment — P/V Valve (1)Equipment — P/V Valves (3)Equipment — Reducers (1)Gas Hazards — Benzene (1)Gas Hazards — Flammable Range (1)Gas Hazards — H2S (1)Gas Hazards — Vapor Density (1)Gauging — Closed (2)Gauging — Closed Gauging (1)Gauging — Ullage (1)Hoses & Connections (2)Inert Gas — Deck Seal (1)Inert Gas — Deck Water Seal (1)Inert Gas — Inerted Atmosphere (1)Inert Gas — Maintaining Pressure (1)Inert Gas — Oxygen Limit (1)Inert Gas — P/V Breaker (2)Inert Gas — Purging (1)Inert Gas — Tank Atmosphere (1)Inert Gas — Tank Entry (1)ISGOTT — Ship/Shore Safety Checklist (1)Loading — Initial Rate (1)MARPOL — Annex I Oil Content (1)MARPOL — Annex II (1)MARPOL — Load on Top (1)MARPOL — Machinery Bilge (1)MARPOL — ODME Limits (1)MARPOL — Oil Record Book (2)Mooring — Transfer (1)Operations — Cargo Watch (1)Operations — COW (2)Operations — Crude Oil Washing (2)Operations — Gas Freeing (3)Operations — Inert Gas Topping (1)Operations — Line Clearing (3)Operations — Loading Plan (2)Operations — Segregated Ballast (1)Operations — Slop Tanks (1)Operations — Stripping (1)Operations — Topping Off (3)Operations — Vapor Control (1)Operations — Watch (1)Pollution — Containment (1)Pollution — Discharge Reporting (1)Pollution — MARPOL (1)Pollution — Reporting (2)Pollution — Scuppers (2)Pollution — Slops (1)Pollution — Vessel Response Plan (1)Regulations — Cargo Information (1)Regulations — OPA 90 Double Hull (1)Regulations — Person in Charge (1)Regulations — PIC (1)Regulations — Response Plan (1)Regulations — Tankerman Endorsement (1)Regulations — Transfer Procedures Manual (1)Safety — Benzene (1)Safety — Bonding (2)Safety — Enclosed Space (1)Safety — Flammability (1)Safety — H2S (2)Safety — Hot Work (3)Safety — Inert Gas (3)Safety — Oxygen Analyzer (3)Safety — PPE (1)Safety — Smoking & Ignition Control (1)Safety — Smoking/Ignition (3)Safety — Static (2)Spill Response — Equipment (1)Static — Bonding vs Grounding (1)Static — Initial Loading Rate (1)Static — Settling Time (1)Transfer — Communications (1)Transfer — Declaration of Inspection (1)Transfer — DOI (3)Transfer — Emergency (1)Transfer — Emergency Shutdown (3)Transfer — Gauging (1)Transfer — Hose Markings (1)Transfer — Initial Rate (1)Transfer — Lighting (1)Transfer — Overfill (1)Transfer — PIC (1)Transfer — Pre-Transfer (1)Transfer — Pre-Transfer Conference (2)Transfer — Procedures (1)Transfer — Records (1)Transfer — Splash Loading (1)Transfer — Topping Off (1)Transfer — Warning Signals (1)Transfer — Watch (1)Vapor Control (1)Vapor Control — Detonation Arrester (1)
Radar Observer
20 of 50 freeRadar and ARPA — relative vs true motion, CPA/TCPA, EBL/VRM, clutter controls, plotting, collision-avoidance rules, resolution, and radar aids.
Aids — Racon (2)Aids — SART (1)ARPA — Acquisition (1)ARPA — Errors (1)ARPA — Trial Maneuver (1)ARPA — Vectors (2)Collision Avoidance — Assumptions (1)Collision Avoidance — CPA (1)Collision Avoidance — Maneuver (1)Collision Avoidance — Risk (1)Collision Avoidance — Rules (1)Collision Avoidance — TCPA (1)Controls — Clutter (2)Controls — EBL (1)Controls — FTC (1)Controls — Gain (1)Controls — STC (1)Controls — Tuning (1)Controls — VRM (1)Detection — Target Factors (1)Display — Motion (1)Display — Orientation (2)Display — True Motion (1)Integration — AIS (1)Limitations — Indirect Echo (1)Limitations — Second Trace (1)Limitations — Shadow (2)Limitations — Side Lobes (1)Operation — Guard Zone (1)Operation — Parallel Index (1)Operation — Performance Monitor (1)Performance — Minimum Range (1)Performance — Radar Horizon (1)Performance — Range (1)Performance — Resolution (4)Plotting — Aspect (1)Plotting — CPA (1)Plotting — DRM/SRM (1)Plotting — Interval (1)Plotting — Relative Motion (1)Plotting — Vectors (1)Propagation — Ducting (1)
Safety, Fire & Survival
20 of 140 freeSTCW Basic Training and vessel safety — firefighting prevention and response, survival craft and personal survival, abandon-ship and lifesaving appliances, distress signals, and first aid and medical care aboard.
Abandon Ship (5)Damage Control (2)Damage Control — Free Surface Effect (1)Damage Control — Progressive Flooding (1)Damage Control — Shoring and Plugging (1)Distress Communications — MAYDAY (1)Distress Communications — SECURITE (1)Distress Signals (2)Distress Signals — Recognized (1)Enclosed Spaces (3)Enclosed Spaces — Atmosphere Testing Order (1)Enclosed Spaces — Drills (1)Enclosed Spaces — Rescue (1)Enclosed Spaces — Rescue Rule (1)Fire — Boundary Cooling (1)Fire — Classes (1)Fire — Detection (1)Fire — Detection Types (1)Fire — EEBD (1)Fire — Extinguishing Mechanism (1)Fire — Fire Control Plan (2)Fire — Fire Patrols and Watchkeeping (1)Fire — Fire Pump (1)Fire — Fireman's Outfit (1)Fire — Fixed CO2 Operation (1)Fire — Fixed CO2 System (1)Fire — Fixed Foam Systems (1)Fire — Foam (1)Fire — Galley (1)Fire — Galley (Class K/F) (1)Fire — International Shore Connection (2)Fire — Portable Extinguisher Selection (1)Fire — SCBA (1)Fire — Structural Fire Protection (1)Fire — Structural Protection (1)Fire — Triangle and Methods (1)Fire — Triangle/Tetrahedron (1)Fire — Ventilation and Fuel Control (1)Fire Prevention (1)Fire Theory (4)Firefighting (8)First Aid (5)First Aid — Bleeding (1)First Aid — Burns (1)First Aid — Choking (1)First Aid — CPR (1)First Aid — Hypothermia Rewarming (1)First Aid — Severe Bleeding (1)First Aid — Shock (1)GMDSS — Distress Frequencies (1)GMDSS — DSC (1)GMDSS — DSC Distress Alert (1)GMDSS — EPIRB (1)GMDSS — EPIRB Registration (1)GMDSS — EPIRB Release (1)GMDSS — False Alert Cancellation (1)GMDSS — False Alerts (1)GMDSS — SART (1)GMDSS — SART Operation (1)GMDSS — Sea Areas (1)GMDSS — Survival Craft VHF (1)Helicopter Operations (1)Lifesaving Appliances — Immersion Suit (1)Lifesaving Appliances — Lifeboat Release (1)Lifesaving Appliances — Lifejacket Light (1)Lifesaving Appliances — Liferaft (1)Lifesaving Appliances — Liferaft Equipment (1)LSA — Hydrostatic Release Unit (1)LSA — Immersion Suit Donning (1)LSA — Lifebuoys (1)LSA — Liferaft Painter (1)LSA — Line-Throwing Appliance (1)LSA — SOLAS Pack (1)Man Overboard — Immediate Action (1)Man Overboard — Williamson Turn (1)Muster & Drills — Abandon Ship Signal (1)Muster & Drills — Frequency (1)Muster & Drills — Muster List (2)PFDs & Immersion Suits (4)Pyrotechnics — Parachute Flare (1)Risk — Hot Work Permit (1)Risk — Permit to Work (2)SAR — Datum (1)SAR — Datum and Drift (1)SAR — Distress Relay Obligation (1)SAR — Expanding Square Search (1)SAR — Obligation (1)SAR — On-Scene Coordinator (1)SAR — Search Patterns (1)Survival — Abandonment Priorities (1)Survival — Cold Water (1)Survival — Cold Water 1-10-1 (1)Survival — Drinking Water (1)Survival — Helicopter Rescue (1)Survival — HELP Position (1)Survival — Hypothermia Treatment (1)Survival — Lifeboat On-Load Release (1)Survival — MOB Recovery Risk (1)Survival — Sea Anchor (1)Survival — Signaling Equipment (1)Survival — Survival Craft Boarding (1)Survival — Thermal Protective Aid (1)Survival — TPA (1)Survival — Water Discipline (1)Survival at Sea (4)Survival Craft (3)
Mixed practice
Random questions drawn from all 2190 across every category — closest to exam day.
Chart Plotting Lab
Interactive plotting sheet — course & distance and set & drift, auto-graded. The hands-on way to beat the plotting section.
You can practice without an account — progress saves on this device. Create a free account to sync your spaced-repetition schedule across devices and track mature vs. learning cards.