Marine Gyro Compasses for Ships Officers Dividers Barrow to Heerschel Island is

Barrow to Heerschel Island is a standard navigation chart used by commercial and recreational mariners alike

Edition #: 31

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Scale: 931650

Marine Gyro Compasses for Ships Officers Dividers Barrow to Heerschel Island isModern marine gyro compasses are well proven and give excellent service with a minimum of attention and maintenance by the operator. They have, on most merchant and naval vessels, become the primary directional reference, leaving the magnetic compass very much the reliable stand by. But as with the magnetic compass the prudent navigator must understand the equipment upon which he relies so much, and appreciate its limitations and the conditions which