$9.95
Formally published by NGA (NIMA Form 8660-9), these 5.5" x 8.5" cards are printed double-sided. 100 cards per pack. Use in conjuction with the Notice to Mariners to make and track changes and updates to nautical charts.
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2017 Edition, Vol I & II Combined The American Practical Navigator (NGA Pub No. 9) describes the modern principles of marine navigation and includes the formulas, tables, data and instructions required by navigators to perform the computations associated with dead reckoning,...