18" Aluminum Arms Parallel Rule (Weems & Plath 138) Inner Seas of the West Coast of Scotland This information enhances the efficiency

This information enhances the efficiency of maritime operations and helps in avoiding unforeseen challenges related to tidal variations

vessels registered under Peruvian flag state must display the Peru Country Flag according to international maritime regulations

British Admiralty Nautical Chart 4929: Otter Passage to McKay Reach is a standard nautical chart

Scale 1:750

British Admiralty Nautical Chart 193: Islands in the Sicilian Channel is a standard nautical chart

18" Aluminum Arms Parallel Rule (Weems & Plath 138) Inner Seas of the West Coast of Scotland This information enhances the efficiencyThe 18 inch (45. 72cm) Aluminum Arms Parallel Rules feature aluminum arms that join two clear acrylic rulers enscribed with a protractor scale. An essential item in any proper navigation kit, these rules are used to plot direction on a nautical chart from any convenient meridian or compass rose. The two straight edged rulers are connected to maintain the same angle. By walking the rules across the chart and securely holding down the non moving ruler,