GMA CoC EOOW case studies

GMA CoC EOOW · Put your knowledge to work in context.

The GMA Certificate of Competency - Engineer Officer of the Watch (EOOW) is a professional marine engineering credential for officers preparing to stand engineering watches in a manned engine room or periodically unmanned machinery space under STCW Regulation III/1. It signals that the holder can run propulsion and auxiliary plant safely, diagnose faults under time pressure, and take charge of the watch. The GMA CoC EOOW case studies are 5 cases and about 3,604 words.

Fuel changeover with a stuck viscosity controller on the approach

At 0450 the 6S60MC-C main engine is on 380 cSt HFO at 8 knots, 6 nm from the pilot station, with the bridge expecting manoeuvring speed at 0520. Company procedure requires changeover to MDO before manoeuvring.

754 words, about 4 min 2

Exhaust gas economiser outlet temperature rise on passage

A 4,500 TEU container ship is on passage. At 1400 the exhaust gas economiser outlet temperature reads 208 °C against a normal 162 °C and has risen 46 °C in 40 minutes; the EGE inlet is steady at 340 °C.

707 words, about 4 min 3

Blackout while manoeuvring with the emergency generator failing to start

At 0230 the ship is manoeuvring in the approach channel at 6 knots. The 1,050 kW auxiliary generator is loaded to 890 kW with the standby generator in auto-start.

717 words, about 4 min 4

Defective oil content meter and pressure to discharge bilge water

At 2130, in the Mediterranean Sea 30 nm from land, the chief engineer instructs you to discharge the machinery space bilge holding tank. The oily water separator is running, but its 15 ppm oil content meter has been defective for three days and the alarm is isolated; the chief says to use the manual bypass and record the discharge as compliant in the Oil Record Book.

725 words, about 4 min 5

Rest hours, fatigue and an instruction to cover additional watches

You are the third engineer on a bulk carrier during a four-day port stay. In the last 24 hours you have had 4 hours’ rest in two blocks (0200–0400 and 0530–0730) because of cargo operations and a ballast pump failure.

701 words, about 4 min