A mast is a post that has no cargo-handling gear.
Masts can appear on the deck, bridge, or funnel of a
ship. A mast on a king post is coded as a king post.
In all instances, masts are coded if they are heavy
enough to be easily discerned. A mast installed on a
funnel is coded as if it were located forward of the
A ventilator without cargo-handling gear is coded
as a mast if it is prominent. Figure 13-3 1 shows the
types of masts usually installed on merchant ships.
A king post is an upright with cargo-handling
devices attached to it. Since king posts are designed
for handling cargo, they are located at the forward or
after end of a hatch.
King posts may be arranged singly or in pairs.
King posts located against the bridge, but not rising
above it, are not coded.
A funnel serving as a king post is coded as if it
were located after the king post.
A ventilator rigged for cargo-handling is coded as
a king post if it is conspicuous. Figure 13-32 shows
some frequently seen king posts.
Cranes are cargo-handling devices. The whole
unit pivots about its base and is usually capable of
rotating 360°. Cranes are distinctive features and,
when they can be easily seen, are coded. When cranes
Figure 13-31.Types of masts.