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12. ROUTES
12-11
Search
type
Options Sample pattern
[Expand-
ing square]
[Direction]: Set the direction to start
the search, [Clockwise] or [Anti-
clockwise].
[Search Pattern Heading]: See the
right figure.
[Start Leg Length]: Enter the start
leg length.
[Number of Legs]: Enter the num-
ber of legs to use.
Starting at the probable location of
the target, the search vessels ex-
pand outward in concentric
squares.
[Parallel
tracks]
[Direction]: Select the direction to
start the search, [Clockwise] or [An-
ticlockwise].
[Search Pattern Heading]: See the
right figure.
[Start Leg Length]: Enter the start
leg length.
[Track Space]: Enter the length of
the short legs in the route.
[Number of Legs]: Enter the num-
ber of legs to use.
The parallel tracks pattern is usual-
ly the first pattern used in undertak-
ing a search operation, since it
assumes that the object to be
searched.
Start Point
Start Leg
Length
Search
Pattern
Heading
WPT6
WPT5
WPT1
WPT2
WPT3
WPT4
WPT8
WPT7
90.00°
90.00°
90.00°
90°
6
5
2
1
3
4
Search
Pattern
Heading
(North ref.)
Start Leg
Length
Track space
Start Point
WPT13
WPT10
WPT9
WPT6
WPT5
WPT12
WPT11
WPT8
WPT7
WPT4
WPT3
WPT1
WPT2
Leg 6/6
Leg 5/6
Leg 4/6
Leg 3/6
Leg 2/6
Leg 1/6