I am set up one of these -sundance teaser http://www.boonebait...x&cPath=507_511 - to hang under the boat at 5M. It is set off the bouy on the jesus christ line off the rear quarter bollard/railing- thus increase the overall area of "boat awareness", very handy on new sites for coming immediately back to the boat position, without using expensive sonic transmitters/receivers.
It will aid in finding the boat position as the light carries well at that hieght in the water column in good viz , without having to look up so much, do safety stops and also provide a snap position to fasten camera for easier retrieval. Having a bungee cord attached to the flasher to be a shock absorber for any wave motion for the camera snap clip.
Also it will attact pelagic fish as a bonus.
Hope some find this idea useful.