NAVIGATIONAL AIDS

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