Your 80 GT coastal workboat operates between UK ports. Your examiner asks: "Which MARPOL Annexes apply to your vessel, and what records must you keep?"

A. MARPOL Annex I: oil pollution prevention applies to all mechanically propelled ships — an Oil Record Book Part I is required for vessels with machinery spaces (all sizes for oil residue entries, but formally required for 400 GT+ for ORB; vessels under 400 GT are subject to Annex I discharge requirements but a simplified record may apply). Annex V (Garbage): Garbage Management Plan required for 100 GT+ vessels; Garbage Record Book for 400 GT+. Annex VI (Air Pollution): applies to all vessels — fuel sulphur limits apply including ECA 0.1% limits in North Sea. In practice, a UK workboat in UK waters must: keep engineering records of fuel use; manage garbage appropriately; use compliant fuel in UK waters (which are in the North Sea ECA); report any accidental discharge.

B. MARPOL does not apply to vessels under 100 GT. Only the MCA's domestic pollution regulations apply to small commercial workboats.

C. All MARPOL Annexes apply identically to all vessels regardless of size. An 80 GT workboat must keep a full Oil Record Book, Garbage Record Book, and carry an IOPP Certificate.

D. MARPOL applies only to vessels on international voyages. A vessel trading exclusively between UK ports is exempt from all MARPOL requirements.

A. A Master (STCW II/3) certificate authorises command of ships of less than 500 GT engaged on near-coastal voyages only. It does not authorise command on international unrestricted voyages or on vessels 500 GT and above. "Near-coastal" is defined by the flag state — in UK practice, MCA defines near-coastal voyages as voyages within defined sea areas relative to the UK coastline. To command vessels 500 GT+ or on worldwide voyages, a Master Unlimited (STCW II/2) certificate is required. A Master < 3000 GT Unlimited covers larger vessels but is typically combined with the Chief Mate Unlimited examination in MCA practice.

B. The STCW II/3 certificate authorises command of any vessel provided it is engaged in domestic trade. There is no size restriction if the voyage remains within national territorial waters.

C. A Master < 500 GT NC certificate authorises command of all vessels less than 500 GT anywhere in the world. The "near-coastal" designation applies to the vessel type, not the voyage area.

D. The certificate is identical to OOW < 500 GT NC. The only difference is the title — both authorise the same operational functions.

A. Under the MCA Workboat Code (2nd Edition), CTVs and workboats must carry a Stability Booklet approved by the MCA or a Recognised Organisation. The booklet must contain loading conditions relevant to the vessel's operational profile. For offshore CTVs, specific loading conditions must include: personnel transfer (maximum persons), cargo runs, and light ship. The operator must complete a pre-departure stability check for each sailing condition. The IMO IS Code 2008 intact stability criteria apply: GM minimum 0.15m; GZ criteria; weather criterion. Some workboats may have additional class-specific criteria. The Workboat Code requires vessels to operate within the ranges defined in the approved stability booklet at all times.

B. Vessels under 100 GT are exempt from stability documentation requirements under the Workboat Code. The master decides whether the vessel is stable based on experience.

C. Stability requirements for workboats are set by the vessel's insurer. The MCA approves the insurer's criteria and the master follows the insurer's stability guidance.

D. Only passenger vessels need an approved Stability Booklet. CTVs under the Workboat Code use a simplified load assessment based on the vessel's freeboard only.