Chapter 3: Using The Controls; More Navigation Terminology; Highlight Two: More Navigation Terms - NorthStar 961 Reference Manual

Chapter 3 - Using the Controls

More navigation terminology

Highlight Two: More navigation terms

ARCS: Admiralty Raster Chart Service. The
electronic chart service designed by the United
Kingdom Hydrographic Office (UKHO).
Course line: A line of travel from your present
position to your upcoming (active) waypoint.
Differential GPS (DGPS): A U.S. Coast Guard
(USCG)-developed system of GPS corrections that
further increases position accuracy (requires a
DGPS receiver). For more information, see
"Introducing GPS and DGPS" starting on page
2-11.
Hydrographic Chart Raster Format (HCRF): A
chart format designed by the United Kingdom
Hydrographic Office, and used by ARCS (see
ARCS definition above).
Leg: The line, or path, between any two waypoints
in a route or a trip.
Page 3-2
Some users who are new to navigation may find unfamiliar
terms in this chapter; these terms have a special meaning
throughout the manual. Highlight Two defines several
navigation expressions with which experienced navigators
may already be familiar.
Nav aid: Aids to navigation often used on
coastal and inland waters. Nav aids primarily
comprise buoys, lighthouses, and daymarkers,
and their purpose is to warn you of such hidden
dangers as underwater hazards, and to help
you safely navigate through specific waterways
and channels.
Trip: A sequence of waypoints comprising
today's journey—a record of waypoints
(including past, active, and future ones),
coordinates, and routes. The trip function
provides a way to check your actual progress,
as well as make changes, while you travel. On
CHART
the screen, the 961/962 color-codes
your trip according to its legs: the past leg of
the trip is displayed in yellow; the course line to
the active waypoint is displayed in green; and
future trip legs are displayed in light blue.
961/962 Operations and Reference Manual, Rev. A