Figure 8-1.-Example output of the Tides Geographic Display.
NAVSAR uses the search object’s description its
last known location, and environmental data to estimate
the search object location at the time of the search.
Using search asset information provided by the SMC,
the program will provide search recommendations in
terms of rectangular areas in which to search.
LIMITATIONS AND ASSUMPTIONS
The restrictions as well as the principles taken for
granted in using the NAVSAR program areas follows:
. There are three search object location scenarios
to define the search object’s location prior to distress
time. These are Last Known Position, Trackline, and
Area of Uncertainty. The operator can select up to five
plans of action to enter on the status board, but only one
can be a Trackline scenario.
l There are two processing modes used by
NAVSAR that result in different output formats for the
recommended search plan. The first processing mode
is referred to as level I. The level I mode occurs when
the only object location scenario is the Last Known
Position scenario. The recommended search is evenly
distributed over the entire area, All other location
scenarios and combinations of scenarios invoke the
level II mode. The recommended search plan will
contain a search effort density map. Search effort
concentration is given as swept areas.
. A level I recommended search plan can be added
to the status board. A level II recommended search plan
cannot be added to the status board, but can be entered
manually as a search plan via the search plan data.
. The operator selects the type of object to be
searched from a predefine list.
l A search object trackline is described by up to
four leg segments defined as either all great-circle or
rhumb lines.
. Each search object location scenario must have
a confidence value entered by the user. The total
confidence values for all scenarios must add up to 100
percent. When revising the status board, the operator
enters anew search object location scenario, and at least
one of the previous location scenario confidence entries
must be changed so that the total confidence for all
scenarios is once again 100 percent.
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