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offering detailed astronomical data crucial for safe and accurate celestial navigation at sea
Australia - South Coast - South Australia - Spencer Gulf and Gulf St Vincent 1:500
For more than 65
Papua New Guinea - South Coast - Port Moresby 1:15 000
replacing loops and the hoist (the bit that goes against the flagpole)
Bosuns Whistle 209 offering detailed astronomical data crucialA Bosun's Whistle or Boatswain's Call like this was an instrument used to give commands to the crew when voices could not be heard over the sounds of the sea. These are still used in the Navy all around the world.