Page 70 951/952 Operator’s Manual Rev. BChapter 5 - Determining Position CoordinatesUsing Phantom LoranThe unit’s Phantom Loran feature is designed for those userswho have compiled lists of fishing spots or other locations asloran TDs, but are now using the unit as a GPS-only navigator.The unit mathematically converts GPS lat/lon coordinates toloran TDs—in real time, as you travel—enabling you to displayyour current position as TDs.You can also enter waypoint coordinates as loran TDs (see”Entering waypoints numerically” starting on page 78).The unit can be used to simulate full operation of a loranreceiver. You can display position coordinates as TDs, and useall navigation functions as if the unit were actually receivingloran signals. Remember, however, that these calculated TDswon’t exactly match the positions of previously recorded TDcoordinates obtained directly from actual loran signals. Inmost areas, TD errors shouldn’t exceed one microsecond; how-ever, larger errors are possible in areas for which the unitdoesn’t contain accurate, factory-programmed ASF correctionpoints.Selecting PhantomLoranTo display Phantom Loran TDs as position coordinates, selectPhantom Loran as the position source, as described below.1. Press the 67$5 key until the USER CUSTOMIZATIONscreen is displayed.2. Press the 1$9,*$7,21237,216 menu key. TheNAVIGA-TION SOURCE line is designated by the cursor arrow.3. Press the (',7 menu key. The cursor begins flashing.4. Press the &856253$' to display PHANTOM LRN as theposition source.5. If you change your mind, press &/($5to restore the orig-inal setting; otherwise, press the (17(5 key, then the5(7851menu key, then the 326,7,21 key.
