GASCO Exit Exam • Set 10 Question 12 of 30
Which of these factors is not considered when calculating the heel to be retained onboard?
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Direct Answer
Option B: Saturated vapor pressuree of the cargo
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
Duration of ballast passage
B
Saturated vapor pressuree of the cargo
(Correct Answer)
C
Weather forecast for the loaded passage
D
Level restriction due to sloshing effect
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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