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Single pull macgregor type hatch cover.pdf - Cochin University of ...

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Table 2.2 Summarizes the most important characteristics <strong>of</strong> each major <strong>type</strong><br />

NNo Cover <strong>type</strong> Usual<br />

ship<br />

<strong>type</strong>s<br />

Decks<br />

applicable<br />

Approxima<br />

te %<strong>of</strong><br />

<strong>cover</strong>s<br />

fitted to<br />

recent new<br />

ships<br />

Guide to<br />

minimum<br />

coaming<br />

height<br />

1 <strong>Single</strong> <strong>pull</strong> (D) Weather 41 Depends<br />

on<br />

section<br />

lengths<br />

but more<br />

than(A)<br />

2 Hydraulic (D) Weather/Tween 25 (A),(B)<br />

folding<br />

3 Wireoperated<br />

folding<br />

4 Direct <strong>pull</strong> All ships<br />

with<br />

cargo<br />

5<br />

Roll<br />

stowing<br />

6 Side and<br />

end rolling<br />

or(C)<br />

(D) Weather/Tween 10 (A),(B)<br />

or(C)<br />

gear<br />

Drive<br />

system<br />

Electric,<br />

hydraulic<br />

or ship’s<br />

cargo<br />

gear<br />

10<br />

Cleating<br />

system<br />

(E)<br />

Hydraulic (E)<br />

Weather 3 (A) Or(B) Ship<br />

crane or<br />

derrick<br />

(D) Weather 2 Depends<br />

on drum<br />

diameter<br />

but<br />

usually<br />

more<br />

than (A)<br />

All, but<br />

mainly<br />

large<br />

bulkers<br />

and<br />

OBOs<br />

7 Lift and roll All, but<br />

mainly<br />

8 Tweendeck<br />

sliding<br />

9 Pontoon<br />

(F)<br />

bunkers<br />

Multideck<br />

cargo<br />

ships<br />

Containe<br />

r ships,<br />

Multideck<br />

cargo<br />

ships<br />

or(B)<br />

Winch Screw or<br />

quickacting<br />

Electric or<br />

hydraulic<br />

Weather 4 (A) or (B) Electric or<br />

hydraulic<br />

Weather 2 (A) or (B) Electric or<br />

hydraulic<br />

Tween and Car<br />

decks<br />

Automatic<br />

(E)<br />

(E)<br />

(E)<br />

2 (C ) Electric Token<br />

Weather/Tween 11 (A), (B) or<br />

(C)<br />

Source: Cargo Access Equipment for Merchant Ships.<br />

Ship or<br />

shore<br />

crane<br />

(E)

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