Raymarine RAY 210VHF - Manual (Page 16)

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1.3.2 Mechanical Specifications
Waterproofness: CFR 46 Parts 110,111
Mechanical Requirement
(1) Cabinet Front : ABS
Rear : Die-Cast
(2) Keyboard Silicon Rubber
(3) Display Custom LCD ( EL Backlit LCD )
(4) External Hardware Non Corrosive and porous metal shall be
used
(5) External connections Antenna M-Type power/External
Speaker 4- Pin Jack