Photo 1 of 3 Pcs Basic Navigation Set, Include 16 Inch Parallel Ruler with Brass Arms Nautical Protractor Navigation Divider with Clear Scales, 6 Inch Marine Fixed Points Divider for Boat

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Photo 1 of 3 Pcs Basic Navigation Set, Include 16 Inch Parallel Ruler with Brass Arms Nautical Protractor Navigation Divider with Clear Scales, 6 Inch Marine Fixed Points Divider for BoatPhoto 2 of 3 Pcs Basic Navigation Set, Include 16 Inch Parallel Ruler with Brass Arms Nautical Protractor Navigation Divider with Clear Scales, 6 Inch Marine Fixed Points Divider for Boat