Navigation
Set. The AN/VSN-8( ) Vehicular
Navigation Set is also included in this manual.
NAVIGATIONAL AIDS
Other equipment used for navigation that ETs are
responsible for includes: navigation radars, surface
search radars (sometimes used as navigation radars)
and fathometers. Information on surface search and
navigation radars is contained in NAVEDTA 12414,
Radar Systems.
The
following
paragraphs
will
discuss
fathometers.
FATHOMETERS
Fathometers are used for taking depth soundings.
They are particularly useful when the vessel is
transitioning shallow, unfamiliar waters. A block
diagram of the Sonar Sounding Set AN/UQN-4A is
shown in figure 1-15,
On many ships the Sonar Technicians will be
responsible for this equipment, but there are ships
(mostly noncombatants) on which ETs are responsible
for the fathometers. For more detailed information on
fathometers, refer to the appropriate equipment
technical manual.
Figure 1-15.—AN/UQN-4A functional diagram.
1-19
