Navigation

NAU 102

Lesson 8

Pilot Charts

Enables mariners to select the fastest, safest routes; covers expected weather and ocean

conditions.

Small scale charts covering ocean basins.

Used for voyage planning, not positioning.

Pilot Charts

Graphically depict:

Recommended routes

Ice limits

Prevailing winds

Ocean currents

Average wave heights

Pilot Charts

Each atlas consists of 12 charts, 1 for each month of the year.

5 Atlases cover the world.

Published quarterly by NGA.

Pilot Charts

Enable you to select the fastest, safest routes.

Pilot Charts

Pilot Charts

Tide Tables

4 volumes by location

Data on high & low tide.

Privately published based on NOS data

Tide Tables

East Coast of North & South America

Published in 4 volumes

Europe & West Coast of Africa

West Coast of North & South America

Central & Western Pacific & Indian Ocean

Tide Tables

Tables enable calculations of height of tide at any time.

Daily predictions of HW & LW at reference stations (major ports).

Corrections can be applied for subordinate stations.

Tide Tables

Tide Tables

Tidal Current Tables

2 volumes by location

Data on tidal currents

Privately published based on NOS data

Tidal Current Tables

Tables enable calculations of speed of tidal current at any time.

Daily predictions of maximum currents at reference stations (major ports).

Corrections can be applied for subordinate stations.

Tidal Current Tables

Tidal Current Tables

Radio Navigational Aids

Location & frequencies of aids

useful for radio navigation

•RDF stations

•Radiobeacons

Published by NGA

•Loran stations

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.

Corrections are promulgated through Notices to Mariners

Always use the current edition.

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; no longer in

print format, internet based only.

Local NTM

Introduction to Navigation

Questions?