| NOS |
NIMA |
|
IHO/Foreign NIMA Charts |
| Decca |
|
 |
Identification of Lattice Patterns |
 |
|
 |
Line of Position (LOP) |
 |
|
Line of Position representing Zone Limit (or, on larger scales, other intermediate LOPs) |
 |
|
Half-lane LOP |
 |
|
LOP from adjoining Chain (on Interchain Fixing Charts) |
|
|
 |
Lane value, with Chain designator (Interchain charts only) and Zone Designator |
 |
| Loran-C |
 |
Identification of Loran-C Rates |
 |
 |
Line of Position |
 |
|
LOP representing time difference value of an integral thousand µs (microseconds) |
 |
|
LOP beyond reliable groundwave service area |
 |
|
LOP from adjoining Chain |
 |
|
LOP from adjoining Chain beyond reliable groundwave service areas |
|
 |
LOP labeled with rate and full µs value |
 |
|
 |
LOP labeled with final three digits only |
|
| Note: A Loran-C Chain Diagram may be given if rates from more than one Chain appear on a chart. An explanatory note is given if LOPs include propagation delays. |
| Omega |
 |
Charted station pairs |
 |
 |
Line of Position (LOP) |
 |
 |
Lane values |
 |
| Note: A cautionary note draws attention to the need to consult Propagation Prediction Correction (PPC) tables. An explanatory note draws attention to the unreliability of LOPs within 450 n miles of a transmitter. |
| Satellite Navigation Systems |
 |
World Geodetic System, 1972 or 1984 |
|
| Note: A note may be shown to indicate the shifts of latitude and longitude, in hundredths of a minute, which should be made to satellite-derived positions (which are referred to WGS) to relate them to the chart. |
