3. EQUIPMENT AND INSTRUMENTS 



3-1 Survey ships. — A modern major sur- 

 vey ship (Class I) is designed to carry on 

 combined operations projects in offshore and 

 remote areas. Each one is a complete and 

 independent unit fully equipped with modern 

 navigational and survey instruments. There 

 are accommodations for a complement of 12 

 to 20 officers and 70 to 90 men. The storage 

 space is sufficient to carry supplies for about 

 6 months' operation. Fuel and water capac- 

 ity enables the ship to remain in the project 

 area for 3 to 4 weeks, if necessary. The ship 

 will usually carry four launches, one of which 

 may be a landing craft, and several small 

 boats such as whaleboats, skiffs, or dories. 



A survey ship should be designed to ac- 



complish her mission efficiently and in safety. 

 Suitable quarters for the ship's comple- 

 ment, adequate storage space for supplies, 

 sturdy ground tackle, steering engine, and 

 launch hoisting gear are essential in a sur- 

 vey ship. A well-lighted and fully-equipped 

 drafting room (Fig. 5) and a large well- 

 equipped navigating bridge must be pro- 

 vided. There must be space for installations 

 of echo sounders and electronic positioning 

 equipment in or just aft of the bridge area. 



Deck space for installing sounding ma- 

 chines and oceanographic winches should be 

 available on the bridge deck or immediately 

 below it. Nearly every operation of a hydro- 



FIRE*STA. 



Figure 5. — Drafting room of a survey ship. 



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