Tested the 53s under varying conditions and very pleased to report they perform as it 'says on the tin'
Max range depth 150m pre-enabled 25 - 30 nm (Act. 50 knts - Pass. 30 knts)
Max range depth 150m enabled at 20 nm - 26 nm. appx.
Max range depth 300m enabled at 20 nm - 24/5 nm appx.
Nice work -
Now looking very hard at the 65s
