Ship Camouflage Instructions
United States Navy
Ships - 2 
Revision 2
Bureau of Ships
June 1942

Camouflage Painting Measures

 Measure 10 - Gray System for Submarines.

Effectiveness

Low visibility for Submarines when in the surface both to surface observation and low angle observation.

High visibility to high angle aerial observation when the submerged submarines operating in areas where aerial observation is an important factor, but will be lower visibility against either sea or sky when observed from surface ships.

Method of Application

Paint entire submarine above the waterline Ocean Gray 5-O.   The painting shall be carried over all parts which are visible for the air including the numbers, capstan and running light boards and bridge rails.  

The radio insulators shall be dark.  The shall be no boot topping.  The underbody shall be painted with the current issues of bottom antifouling paints.

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