Towards Bow
GMR 18
201.5 mm
(7 15/16")
GMR 24
277.4 mm
(10 29/32")
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| GMR 18 |
| GMR 24 | |
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| 236.4 mm |
| 248.9 mm | |
(9 5/16") | (9 13/16") | ||||
GMR 18
457.0mm
(18")
GMR 24
610mm
(24")
233.0 mm
(9 5/32")
GMR 18
114.0 mm
141.5 mm(4 15/32")
(5 9/16") 
GMR 24
190.8mm
(7 1/2")
GMR 18/24 Marine Radar Installation Instructions