Search Planning Flashcards

Question

Shoreline search is...

Answer 1

a modified parallel track using the contours of the shore. Radar can be used to maintain distance.

Answer 2

Uncorrected sweep width x correction factors

Answer 3

Corrected sweep width / track spacing

Answer 4

likelihood that an SRU will see the object given the...

Answer 5

``` Object size Detection aids Sea state Wind speed Aircraft altitude & speed Fatigue ```

Answer 6

``` Area Velocity Number Spacing Time (beware datum time) ```

Answer 7

``` Target Area Pattern Search details Information Communication ```

Answer 8

Target - type, description, detection aids

Answer 9

Area - circular, corner or boundary method or trackline search

Answer 10

Pattern - expanding square etc

Answer 11

Search details - CSP, leg length etc

Answer 12

Information - Weather, OSC, other SRUs

Answer 13

Communications - channels, safety checks

Answer 14

caused by the wind in relation to exposed and underwater surfaces of the object, causing it to diverge from the downwind track. The angle either side of a mean drift that objects fall between. Dmin & Dmax

Answer 15

... describes the area to be searched. Used within IAMSAR. It is the process of generating the search area.

Answer 16

``` Plot DSP Plot tidal vector Plot leeway = Datum point Plot error radius Box off and label ```

Answer 17

Same to datum point Plot divergence from the end of TIDAL VECTOR Plot error radii Box off and label

Answer 18

used for short elapsed time and/or when environmental factors are minimal - commonly up to one hour

Answer 19

``` Datum line Back track Flare RRS EISEC data ```

Answer 20

Fix accuracy DR error Environmental - 30% of drift vector

Answer 21

DET up | DR error down

Answer 22

``` Based on previous track of vessel or MOB Plot DSPs along line DSTs will be different DET up = DR error down Create datum area for each DSP ```

Answer 23

``` Calculates search area from found object Model drift of object back to 3 locations using reverse leeway and divergence Apply errors Apply leeway and divergence forward Use best possible estimate for DST ```

Answer 24

Plot FIF location and line to max detection range DSP along the line. DST THE SAME FOR ALL. Apply leeway and divergence Apply errors

Answer 25

Height of aerial known Height of vessel aerial assumed Nominal range = 2.21 x sq rt antenna height (m) Add the two ranges to get transmission range DSPs along edges of overlapping area

Answer 26

via Tactical Commander & SPOC | DSPs along edges of 120 deg sector

Answer 27

DSP at centroid centre, plot tide, leeway and divergence. Radius of centroid is the error.

Answer 28

``` Preliminary evaluation Choose model type DST, DSP and errors Search duration Datum time DET Estimate drift and errors Establish probable locations and define area ```

Answer 29

Drift start time. The time when the casualty is known, or estimated, to have first started to drift.

Answer 30

Drift start position. The position the casualty is known, or estimated, to have first started to drift. May be the LKP or a position from DR from a previous fix.

Answer 31

Initial position error. Includes navigational fix error and DR error.

Answer 32

Navigational fix error. Accuracy of the last known fixed position. See navigational fix error tables in SAD tables.

Answer 33

DR error. See DR error tables in SAD tables.

Answer 34

``` How long the search is going to take. Consider: Fatigue Number of searchers Survival times Time of day On-scene endurance ```

Answer 35

The most probable location of the casualty at any given time. May be a single point, a set of points, a line, arc or area.

Answer 36

The time for which the search area is valid. For RR will be the time of arrival at datum position of the SRU.

Answer 37

Drift elapsed time. The period of time over which the target is drifting - from DST to datum time.

Answer 38

DSP to datum. Resultant vector of the tidal vector and leeway vector.

Answer 39

Drift error. Uncertainty in leeway and tide. 30% of the total drift distance.