Dive Tigger
Guest
That's amazing. Topside, it looks so innocuous!
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Visual markers may last century but considering, that electronics 1) do not like water 2) do not stand up to depth 3) fail on their own 4) can be expensive, 5) need batteries, 6) are hopefully not need very often etc. I think you will find that few people carry electronic beacons. As such, it pays to have a full range of signal devices.
A on land equivalent are twits who go out with only a GPS and have no clue how to use a map and compass.
All the more reason for the staff, DM's and boat captains, to take extra precautions to ensure they WILL be able to track divers. If the staff know how treacherous the area is then there is a clear obligation on them.Komodo's currents can sneak up on you in an instant