GASCO Exit Exam • Set 8 Question 17 of 30
Why is adequate heel retained during short ballast voyages?
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Direct Answer
Option D: It enables loading without further cool down on arrival
Retaining a small heel of LNG cargo on ballast voyages maintains tank cryogenic temperatures, minimizes thermal shock, and avoids lengthy pre-cooling at the loading port.
All Options
A
It is done as cargo tanks cannot be stripped completely
B
It reduces the ballast to be taken and thus improves turn around
C
It reduces boil-off rates during the ballast voyag
D
It enables loading without further cool down on arrival
(Correct Answer)
Detailed Explanation & Context
Retaining a small heel of LNG cargo on ballast voyages maintains tank cryogenic temperatures, minimizes thermal shock, and avoids lengthy pre-cooling at the loading port.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).
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