On Jun 10, 12:00 pm, Geoff Schultz wrote:
I've been trying to decide where to mount the hailer. ...

How about putting it on the arch over the dorades? A decent speaker
is a heavy thing so putting it at the top of the mast might not be
ideal. But, I don't think there would be any problem with audibility
if installed up there even from low and close to the boat. These
things are quite loud.

-- Tom.