GMA OOW Deck study materials
GMA OOW Deck study resources

GMA OOW Deck study plan

GMA OOW Deck · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Navigation

  • Explain the principles of terrestrial coordinate systems, including latitude, longitude, and the use of the nautical almanac, without reference notes.

  • Calculate compass error using amplitudes and azimuths of the sun, and convert between true, magnetic, and compass bearings for a set of given problems.

  • Interpret a nautical chart extract to identify symbols, abbreviations, and dangers, and plan a safe route through a constrained channel.

  • Describe the operation and limitations of echo sounders, speed logs, and gyrocompasses, and state the checks required before relying on their outputs.

Your checkpoint

A worked navigation problem set of 20 mixed questions (compass error, chart symbols, position fixing) with step-by-step solutions, self-marked to at least 80% accuracy.

Week 2

Navigation & Marine Communications (GMDSS)

  • Perform a running fix and estimated position calculation using tidal stream data, and explain the assumptions behind each.

  • Demonstrate the use of GNSS and terrestrial position-fixing methods, and list the failure modes and cross-check procedures for each.

  • Outline the carriage requirements and functional operation of GMDSS equipment for Sea Area A1–A4, including VHF, MF/HF, Inmarsat, and NAVTEX.

  • Transmit and interpret a distress alert, urgency, and safety message using correct GMDSS priority and procedure.

  • Explain the purpose of the NAVTEX and EGC systems and decode a sample NAVTEX message.

Your checkpoint

A one-page quick-reference card summarizing GMDSS sea areas, equipment carriage, and distress/urgency/safety alert procedures, plus a completed passage plan for a 24-hour coastal voyage.

Week 3

Maritime Law and International Conventions & Shipboard Safety and Emergency Procedures

  • Summarize the key obligations under SOLAS, MARPOL, and STCW relevant to an OOW, and match each to a practical shipboard action.

  • Explain the requirements of the ISM Code and ISPS Code as they affect daily deck operations and security drills.

  • Describe the actions required under the collision regulations (COLREGs) for a crossing, head-on, and overtaking situation, and apply them to given scenarios.

  • Outline the emergency procedures for fire, abandon ship, man overboard, and flooding, including the muster list and onboard training requirements.

  • Identify the contents and use of the lifeboat, liferaft, and immersion suit, and state the maintenance and drill intervals required.

Your checkpoint

A completed comparison table of SOLAS/MARPOL/STCW/COLREGs requirements versus shipboard procedures, with at least 15 entries and a short note on the source convention for each.

Week 4

Ship Operation and Personnel Management & Ship Construction and Stability

  • Explain the chain of command, the duties of the OOW, and the principles of safe watchkeeping under STCW, including fatigue management.

  • Describe the procedures for safe mooring, anchoring, and pilot embarkation, and list the associated risk controls.

  • Calculate the effect of adding or removing weights on a ship's stability, including KG, GM, and list, using a simple stability booklet extract.

  • Interpret a hydrostatic table and a deadweight scale to determine draft, trim, and displacement for given loading conditions.

  • Explain the purpose of the load line, freeboard, and intact stability criteria, and state the relevant IMO instruments.

Your checkpoint

A stability calculation worksheet solving three loading scenarios (add weight, remove weight, shift weight) with final GM, list, and trim values, plus a one-page summary of OOW watchkeeping duties.

Week 5

Cargo Handling and Stowage & Ship Construction and Stability

  • Plan a cargo stowage for a general cargo vessel, including segregation, lashing, and weight distribution, and justify each decision.

  • Explain the hazards and precautions for carrying dangerous goods under the IMDG Code, and interpret a dangerous goods declaration.

  • Calculate the effect of a partially filled tank (free surface effect) on initial stability and describe how to minimize it.

  • Describe the procedures for loading and discharging bulk cargoes, including the risks of liquefaction and cargo shift.

  • Outline the requirements for cargo securing manuals and the inspection of lashings before departure.

Your checkpoint

A cargo stowage plan for a mixed general cargo consignment, including a dangerous goods segregation check and a free surface effect calculation, with a written justification of the plan.

Week 6

Meteorology & Marine Engineering (Deck Officer Level)

  • Interpret synoptic charts, identify pressure systems and fronts, and forecast local weather changes for a given area.

  • Explain the formation of tropical revolving storms, the associated warning signs, and the recommended avoidance manoeuvres.

  • Describe the use of weather routing information and the limitations of shipboard forecasting tools.

  • Explain the operation of the main engine, steering gear, and auxiliary systems at a level sufficient to communicate with the engine room and detect developing faults.

  • List the checks and procedures for testing steering gear before departure and during passage, including the emergency steering drill.

Your checkpoint

A weather route plan for a 5-day passage using a provided synoptic chart sequence, with a written explanation of the chosen route and the engineering checks to be completed before departure.

Week 7

Shipboard Safety and Emergency Procedures & Maritime Law and International Conventions

  • Conduct a simulated fire drill and an abandon ship drill, and document the debrief points and corrective actions.

  • Explain the procedures for responding to pollution incidents under MARPOL and the ship's SOPEP, and list the required notifications.

  • Describe the investigation and reporting requirements for marine casualties and incidents under IMO and flag State rules.

  • Outline the survey and certification regime for a merchant ship, including the role of classification societies and port State control.

  • Explain the OOW's responsibilities during an emergency, including communication with the master, crew, and external authorities.

Your checkpoint

A completed drill record and debrief report for a simulated fire and abandon ship drill, including a timeline of actions, a list of deficiencies identified, and the corrective actions assigned.

Week 8

Navigation & Maritime Law and International Conventions & Marine Communications (GMDSS)

  • Complete a full-length timed mock examination covering all domains, and score each section separately.

  • Review every incorrect answer from the mock, classify the error type (knowledge gap, misreading, calculation), and write a corrective note for each.

  • Re-test the three weakest domains using a second set of mixed questions, and compare scores against the first attempt.

  • Summarize the top ten regulatory and navigation facts most likely to be tested, and recite them from memory.

  • Prepare a personal exam-day checklist covering documentation, equipment, and time management.

Your checkpoint

A mock exam score report with section-by-section results, a categorized error log, and a one-page personal revision sheet of the ten key facts, achieving at least 75% overall on the second attempt.

Milestones

Week 2: Score at least 75% on a self-marked 15-question navigation and GMDSS quiz, and produce a passage plan that a master could review without major correction.

Week 4: Complete the stability worksheet with all three scenarios correct within 5% of the reference values, and explain each step aloud without notes.

Week 6: Correctly interpret a three-day synoptic chart sequence and pass a 10-question meteorology and engineering quiz at 70% or above.

Week 8: Achieve at least 75% overall on the full-length mock exam, with no single domain below 60%, and submit the completed error log and revision sheet.