Exam Question
Explain the meaning and purpose of EACH of the following terms:
(a) Duct keel (4)
(b) Margin line (4)
(c) Sheer (4)
(d) Round of Bilge (4)
Class 4 (4th Engineer)
SC&S
📅 Apr 2024
Reference Answer
### (a) Duct keel
**Meaning:**
The duct keel is a continuous, watertight, longitudinal passage or tunnel constructed within the double bottom structure of a ship, typically running along the centreline from the forward collision bulkhead to the after end of the machinery space. It is essentially an accessible, enclosed space forming part of the hull's primary strength members.
**Purpose:**
**Meaning:**
The duct keel is a continuous, watertight, longitudinal passage or tunnel constructed within the double bottom structure of a ship, typically running along the centreline from the forward collision bulkhead to the after end of the machinery space. It is essentially an accessible, enclosed space forming part of the hull's primary strength members.
**Purpose:**
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