Exam Question
What do you understand by margin line? With a neat diagram explain following terms:
(a) Floodable length curve
(b) Permissible length curve
(c) Factor of subdivision
Class 2 (2nd Engineer)
SC&S
📅 Aug 2022
Reference Answer
(c) Factor of Subdivision
The factor of subdivision introduces a safety measure by reducing the size of the compartments to limit the effects of flooding. It ensures that the ship's draft or trim has less chance of touching the margin line during flooding or heeling.
Permissible Length Formula:
$$Permissible\:length=\frac{Floodable\:length}{Factor\:of\:Subdivision}$$
The factor of subdivision introduces a safety measure by reducing the size of the compartments to limit the effects of flooding. It ensures that the ship's draft or trim has less chance of touching the margin line during flooding or heeling.
Permissible Length Formula:
$$Permissible\:length=\frac{Floodable\:length}{Factor\:of\:Subdivision}$$
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