Tanker Familiarization Safety and Emergency Procedures 3

Question 1

What is the correct procedure when entering an enclosed cargo tank that has been declared gas-free?

Accepted Answer

Use a buddy system and maintain continuous communication with a standby person

Answer

IMO and SOLAS require a standby person at the entrance and continuous communication throughout any enclosed-space entry.

Question 2

A tanker's Muster List (Station Bill) must be posted:

Accepted Answer

In conspicuous places throughout the vessel including crew accommodation

Answer

SOLAS requires the Muster List to be posted in conspicuous places so every crew member can locate their emergency duties.

Question 3

Which international signal indicates a vessel is on fire and requires assistance?

Accepted Answer

Flag November Charlie (NC)

Answer

Flag signal NC (November Charlie) is the international distress signal indicating a vessel is in distress and requires immediate assistance.

Question 4

During cargo loading on a chemical tanker, an unexpected rise in tank pressure should prompt the officer to:

Accepted Answer

Slow or stop loading and investigate the cause before continuing

Answer

Unexpected pressure rise can indicate blocked vents, a closed valve, or overfill — all requiring immediate investigation before continuing.

Question 5

What is the minimum safe oxygen concentration level in a tank atmosphere before crew entry without SCBA?

Accepted Answer

20.8% by volume

Answer

IMO guidelines require at least 20.8% oxygen by volume in the atmosphere for a space to be considered safe for entry without breathing apparatus.

Tanker Familiarization Practice Test