NorthStar 958 Operator's Manual page 77

Selecting and
displaying Phantom
Loran
958 Operator's Manual, Rev. A
TDs. The accuracy from this conversion is generally better
than 500 to 1500 feet.
This feature is called Phantom Loran, which helps you move
from using loran to using GPS. Phantom Loran lets you display
your position as TDs, or enter waypoints as TDs. You can use
the 958 to simulate the full operation of a loran receiver, using
all of the 958's navigation functions as if it was actually
receiving loran signals.
These calculated TDs won't exactly match the positions of
previously recorded TDs obtained directly from actual loran
signals. In most areas, TD errors shouldn't exceed one
microsecond. However, larger errors are possible in areas with
poor configuration, or for which the 958 doesn't have
accurate, factory-programmed ASF correction points.
To display position coordinates as Phantom Loran TDs:
1. Press the STAR key to display the OPTIONS/SERVICE
INFO screen.
2. Press the NAVIGATION OPTIONS menu key, then high-
light the NAVIGATION SOURCE option.
3. Press the EDIT menu key, then press the CURSOR PAD to
select PHANTOM LRN.
4. Press the ENTER key, then press the RETURN menu key.
5. Press the CHART key to display the GPS POSITION screen.
6. Press the CHECK LORAN key to display the PHANTOM
LORAN screen.
Chapter 5 - Determining Your Position
Page 69