SEARCH PLAN EFFECTIVENESS / SAROPS Flashcards
Coverage Factor
Measure of search thoroughness or how well an area was searched. Ideal search: C=1.0
C=W/S
Probability of Success
A measure of search effectiveness and the probability that a given search will succeed in locating the object.
Trackline pattern
Used when the intended route of the search object is known.
Parallel pattern
Used for large, fairly level search areas, where only approximate initial position is known, and when uniform coverage is desired.
Creeping Line pattern
Used to cover one end of an area first, or to change direction of search legs when sun glare or swell direction make it necessary.
Square pattern
Used to search a small area when some doubt exists about distress position
Sector pattern
Used when datum is established within close limits, a very high coverage is desired in the immediate vicinity and the area is not extensive. All turns are 120 degrees to the right. After completion a second pattern is started 30 degrees to the right on the final course.
Cumulative POS definition
The probability that all searching done to date would have located the search object
POS formula
POS = POC X POD
Datum definition
The expected location of the search object at any given time.
Goal of Search Planning
To cover as much of the search area as possible with a reasonable POD with the ultimate aim to maximize POS.
POD / Coverage Factor is a measure of what?
Search thoroughness
POS is a measure of what?
Search effectiveness
When do you search the initial flare cone on a first light search?
When the sighting of a flare occurs in a location where a vessel could have anchored or grounded, the first light search should include the initial flare
cone area in addition to the drifted area.
What initial track spacing should you use for a PIW?
0.1 NM
