304 



THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1957 



The twin-screw cable ship Monarch, Fig, 6, was built for H.M. Post 

 Master General by Messrs. Swan, Hunter and Wigham Richardson, 

 Ltd., at their Neptune Works, Walker-on-Tyne. She was completed in 

 1946. This ship is of the shelter deck type having principal dimensions 

 as follows: 



Length overall 482 feet 9 inches 



Breadth moulded 55 feet 6 inches 



Depth moulded to shelter deck 40 feet inches 



Gross tonnage 8,056 



The ship has an overhanging bow which carries three cable sheaves, 

 a cruiser stern with the after paying out cable sheave offset on the port 

 quarter, a semi-balanced rudder having extra large surface, and a cel- 

 lular double bottom extending from the collision to the aft peak bulk- 

 heads. Both main and shelter decks are steel and extend her complete 

 length. 



The cable is carried in four welded steel cable tanks fixed to the tank 

 top plating. These are arranged along the ship's center line in a fore and 

 aft direction forward of the main propelling machinery space. They are 

 each 41 feet in diameter and have the following cubic capacities: 



The opening in the shelter deck above each tank is a circular hatch 

 8 feet in diameter. 



A water tight cone of steel plates is built in the center of each tank 

 to insure against fouling of the cable during payout. Further control 



1854 1750 



1500 



1250 



NAUTICAL MILES 

 1000 750 



500 



250 



2500 



Fig. 5 — Profile of ocean depths between Clarenville and Oban. 



