DWO Emergency Response 4

Question 1

Under US regulations, immersion suits must be donned within what time limit during a drill?

Accepted Answer

2 minutes

Answer

46 CFR requires that crew members be able to don immersion suits within 2 minutes, including putting on the suit over clothing.

Question 2

A vessel's fixed CO2 firefighting system is to be activated. What must happen BEFORE releasing CO2 into a machinery space?

Accepted Answer

All personnel must be evacuated and the space must be sealed

Answer

CO2 displaces oxygen and is lethal; all personnel must evacuate and the space must be secured before discharge to prevent fatalities.

Question 3

What is the term for the area around an EPIRB signal where search and rescue authorities will concentrate their initial search?

Accepted Answer

Datum

Answer

The datum is the most probable position of the search object at a specific time, calculated by SAR coordinators from the EPIRB position accounting for drift.

Question 4

Which firefighting agent is most effective and approved for use on a Class B (flammable liquid) fire aboard ship?

Accepted Answer

AFFF (Aqueous Film Forming Foam)

Answer

AFFF creates a film that smothers flammable liquid fires by separating fuel from oxygen and preventing re-ignition.

Question 5

During heavy weather, a crew member is washed overboard. The vessel's speed is 15 knots. What is the FIRST maneuver recommended by the Williamson Turn?

Accepted Answer

Put the helm hard over to the same side as the person fell and reduce speed

Answer

The Williamson Turn begins with helm hard over toward the side the person fell, eventually reversing course to return on the reciprocal track.

(DWO) Deck Watch Officer Practice Test

(DWO) Deck Watch Officer Practice Test

DWO Emergency Response 4