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Garmin APOLLO GX65 User Manual

Page 322

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MSA: Minimum Safe Altitude. The elevation of the
highest obstruction near the aircraft plus a 1,000 or
2,000

foot

buffer

added

for

safety.

In

non-mountainous terrain, a 1,000 foot buffer is added.
In mountainous terrain, a 2,000 foot buffer is added.
The result is rounded to the nearest 100 feet.

N

Nautical Mile (nm): A distance measurement equal
to 6,076 feet, or 1.15 statute mile. One nautical mile is
also equal to one minute of latitude.

NAVSTAR: The name given to GPS satellites formed
from the acronym for NAVigation System with Time
And Ranging.

Non-Directional

Beacon

(NDB):

A

low

frequency/medium frequency navigation aid sending
non-directional

signals

that

can

be

used

for

navigation.

O

OBS: Omni-Bearing Selector.

P

Parallel Track Offset: A course that is parallel to the
designated course, but offset to the right or left by a
given distance.

PDOP: Position Dilution of Precision. See Dilution of
Precision.

PRN: GPS satellite Pseudo-Random Numbers are
used to uniquely identify satellites. This is different
than the SVN (Space Vehicle Number, or satellite
serial number). When excluding satellites from the
RAIM Prediction , use the PRN number found on the
NOTAMs and NANUs, not the SVN.

R

Radial: Any of the 360 magnetic courses from a VOR or
similar navigational aid, beginning at the navigational
aid and proceeding outward in a straight line.

15-8

Glossary

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