Navigation NAU 102 Lesson 8
Pilot Charts Small scale charts covering ocean basins. Used for voyage planning, not positioning. Enable you to select the fastest, safest routes.
Pilot Charts Graphically depict: Recommended routes Ice limits Prevailing winds Ocean currents Average wave heights
Pilot Charts Published quarterly by NGA. 5 Atlases cover the world. Each atlas consists of 12 charts, 1 for each month of the year.
Pilot Charts
Pilot Charts
Published annually by NOS Tide Tables Data on high & low tide. Published annually by NOS 4 volumes by location
Tide Tables Published in 4 volumes Europe & West Coast of Africa East Coast of North & South America West Coast of North & South America Central & Western Pacific & Indian Ocean
Tide Tables Daily predictions of HW & LW at reference stations (major ports). Corrections can be applied for subordinate stations. Tables enable calculations of height of tide at any time.
Tide Tables
Tide Tables
Published annually by NOS Tidal Current Tables Data on tidal currents Published annually by NOS 2 volumes by location
Tidal Current Tables Daily predictions of maximum currents at reference stations (major ports). Corrections can be applied for subordinate stations. Tables enable calculations of speed of tidal current at any time.
Tidal Current Tables
Tidal Current Tables
Radio Navigational Aids Location & frequencies of aids useful for radio navigation RDF stations Radiobeacons Loran stations Published by NGA
Radio Navigational Aids Radio weather reports Maritime safety information broadcasts Distress communication, etc.
Radio Navigational Aids
Radio Navigational Aids
Radio Navigational Aids
Radar Navigation Manual
Radar Navigation Manual Chapter 4 – Radar Navigation. Use and limitations of radar in navigation.
Radar Navigation Manual Recognition of radar beacons (racons) & ramarks.
Radar Navigation Manual Finding (“fixing”) your position using radar.
Nautical Almanac Published by U.S. Naval Observatory Enables you to calculate: Position of celestial bodies. Sunrise, sunset. Moonrise, moonset.
Nautical Publications Like charts, publications must be up to date. Always use the current edition. Corrections are promulgated through Notices to Mariners
Weekly Notice to Mariners Lists changes to publications. Often involve cutting & pasting.
Weekly Notice to Mariners Completed corrections are recorded on the publication’s Record of Correction page.
Local NTM Issued by Coast Guard Contains information of local interest only. Often of temporary nature.
Local NTM
Introduction to Navigation Questions?