Only freq I have for Coastguard helis is 419.1125 Polycon
But the Coastguard channel 156.0 is doubtless used.
132.65 sometimes used by Coastguard.
340.1 Radar (reported, not heard)
357.175 Radar (reported, not heard)
372.375 Radar (reported, not heard)
409.825 Tower (relay) ~192.8
409.9 ? ~192.8
I reserve the right to ignore people who have made no attempt to the read the manual, and expect others to do it for them.