Search and Rescue Fundamentals

8/10/2019 Search and Rescue Fundamentals

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Search and Rescue Fundamentals

Mission Organization:

1) SAR Coordinator (SC)

2) SAR Mission Coordinator (SMC) 3) Rescue Coordination Center (RCC)

4) Rescue Sub-Center (RSC)

5) On Scene Commander (OSC)

6) SAR Units (SRUs)

Define Search and Rescue:

Search and Rescue is defined as "the use of available personnel and resources in the rendering of aid topersons and property in distress."

List the eight major duties of the SAR Coordinator (SC):

1) Identify all SRUs and SAR resources that may be used within the area.

2) Establish close liaison and agreements with other Services, agencies, and organizationshaving SAR potential and with SAR authorities of neighboring nations to ensure mutualcooperation and coordination.

3) Prepare and distribute a current comprehensive area SAR plan.

4) Establish RCCs to coordinate SAR resources within the region of responsibility and RescueSub-Centers (RSCs) for areas where RCCs cannot exercise direct and effective coordination.

5) Ensure that operations conform to the SAR plan and the National SAR Manual.

6) Conduct SAR, assigning SMC and SRUs until assistance is no longer necessary or rescue hasbeen effected.

7) Suspend SAR cases when there is no longer a reasonable chance of success.

8) Report results to the parent operating command or agency.

State the position responsible for planning the SAR mission:

The SAR Coordinator (SC) ensures SAR operations are coordinated efficiently through the use ofavailable SAR resources. To achieve this, SCs may make SAR agreements with Federal, State, local,and private agencies, providing for the maximum practicable cooperation. Agreements with foreignSARauthorities may be made only as prescribed by Service directives. In the Coast Guard, the SC is usuallythe District Commander.

State the function of the Rescue Coordination Center (RCC):

Rescue Coordination Center (RCC) personnel usually function as SMC and control and coordinate SARoperations within an assigned Search and Rescue Region (SRR). In the Coast Guard, the RCC isnormally a function of the District Command Center.

State the position, which controls the SRUs on scene:

An On Scene Commander (OSC) conducts the SAR mission on scene using the resources madeavailable by the SMC and should safely carry out the Search Action Plan. If the SMC does not provide asufficiently detailed SAR Action Plan, the OSC completes the SMC duties for on sceneoperations,notifying the SMC. An OSC has full operational authority of the SMC and operational control ofall SRUs on scene.


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State the required advanced notice the SRU should provide to the OSC priorto arrival on scene:15minutes

List the five response stages for any SAR incident:

1) Awareness

2) Initial Action 3) Planning

4) Operations

5) Mission Conclusion

List the two most important pieces of information obtained during the awareness stage:

1) Position of Distressed Vessel

2) Nature of Distress

List the five SAR suppor t components:

1) Resources 2) Organization

3) Communication

4) Documentation

5) Emergency Care

List the three emergency phase classifications:

1) Uncertainty - Doubt

2) Alert - Apprehension

3) Distress - Danger

Define Datum:

The most probable location of the search object corrected for movement over a period of time.

State the best source of information on total water current:

Total Water Current (TWC) is," the sum of all the water currents that might be acting upon a search objectin any given locality."

Total Water Current is best determined by inserting Data Marker Buoys (DMBs) around the Last KnownPosition (LKP) of a search target.

State the forces involved in determining total water current:

1) Sea Current

2) Tidal Current

3) Wind Current

4) River Current

5) Lake Current

Define Leeway:


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Leeway (LW) relates to the movement of an object through the water due to the pushing force of thewind. Most marine craft have a portion of the hull and superstructure exposed above the water. The moreexposed area the object has, the greater the wind forces on the object.

State the proper size search area for the coastal model search:

06 nm, search radius

Define track spacing:

The distance between two adjacent parallel search legs is known as track spacing. The desired trackspacing is a function of detection capability. The more difficult the target is to detect due to the weather orthe size of the search object, the smaller the track spacing should be.

Determine uncorrected sweep width:

Uncorrected sweep width is a distance in nautical miles used for measuring detection capability. Thedistance is such that the probability of detecting the target outside that range is equal to the probability ofmissing the target inside the range.

NOTE: Locate the Uncorrected Sweep Width Table for the type of SRU (fixedwing, helicopter, vessel, orsmall boat) in the National Search and RescueManual, Volume II, tables 4-4 thru 4-10.

State the three correction factors you use to determine corrected sweepwidth:

1) Weather

2) Fatigue

3) Aircraft speed

Calculate corrected sweep width:

1. W = Wu X Fw X Ff X Fv2. W - Corrected Width3. Wu - Uncorrected Width4. Fw - Weather Correction5. Ff - Fatigue Correction6. Fv - Search Aircraft Speed Correction7. X- Multiplied By

NOTE: Locate the Tables in the NSM, Volume II, tables 4-4 thru 4-10, tocomplete the equation.

State the correct formula for determining coverage factor:

Coverage Factor is:

1) A measure of search effectiveness or quality.

2) An intermediate calculation when developing probability of detection.

3) Ratio of sweep width to track spacing.

Example: C = W (sweep width)


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S (track spacing)

Given a (W) of 3.1 and a (S) of 2.0 the coverage factor is 1.55

1.55 = 3.1 /2.0

Determine Probability of Detection:

Probability of Detection (POD) is the probability that a search object will be detected on the first search,provided it is in the area searched. It measures search results. After determining coverage factor use thegraph in the NSM, labeled "Maritime Probability of Detection", Chapter 4, PG 4-13.

Identify the meaning of search pattern letter designators:

The first letter indicates search pattern type-

1) Track line T

2) Parallel P

3) Creeping Line C

4) Square S

5) Sector V

6) Barrier B

The second letter indicates the number of SRUs in the same search area-

1) Single-Unit S

2) Multi-Unit M

The third letter indicates amplifying/supplementary information-

1) Radar of Return Search R

2) Coordinated C

3) Loran L

4) Aural A

5) Non-Return Search N

6) Drift Compensated D

State the items that you should consider when selecting a search pattern:

1) Accuracy of Datum


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2) Size and detect-ability of the search object

3) Size and shape of the search area

4) Time available for search

5) Number and type of SRUs

6) En route and on scene weather

7) Navigational ability of the SRUs

8) Desired POD

Track Line Search Pattern:

A Track line (T) search pattern is used when the only information available is the search targets known ofprojected track line. This search pattern is usually the first search action since it is assumed that the

target is near track and will be easily seen or will signal the SRU. Searching a datum line(intended trackline corrected for drift) should be evaluated, as it can be a return or non-return pattern. If a single-unitnon-return (TSN) is conducted, the SRU searches down the track line of datum line. For a single-unitreturn pattern (TSR), offset the search legs one-half track space (S) either side of the track/datum line.

Parallel Search Pattern:

A Parallel (P) search pattern should be used when the search area is large, there is equal probability ofthe target being anywhere in the search area, datum information is fair, and uniform coverage is desiredthroughout the area. The pattern may be used when the degree of detection may have anequalprobability of being anywhere in the search area.

The search legs are parallel to the search area's major axis (longest side oriented down the drift line).

Commence Search Point (CSP) is located onehalf track space inside the search area in the specifiedcorner.

Creeping Line Search Pattern:

A Creeping Line (C) search pattern is used when the search area is large, uniform coverage is desired,datum information is fair, and there is more chance of the target being in one end of the search area thenthe other.

The search legs are parallel to the search area's minor axis (shortest side of the search area or 90degrees off of the major axis).

Square Search Pattern:

A Square (S) search pattern is used when datum is established within close limits and uniform coverageis desired. The first leg is usually oriented down drift (if it is not practical to search the first leg down drift,then another first leg direction may be used). All turns are 90 degrees to the right and a secondis performed by shifting the pattern 45 degrees to the right.

Sector Search Pattern:


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A Sector (V) search pattern is used when datum is established with a high degree of confidence and thetarget is difficult to detect. The search unit passes through datum several times, each time increasing thechances of finding the target.

The pattern resembles the spokes of a wheel, with the center of the wheel at datum. It is the only patternwith a circular area of coverage. The datum may be marked with a floating object such as a DMB. By

marking the center of the search pattern, the SRU has a chance to check its navigation each time theSRU passes near the center of the search pattern. A 60-degree sector search is normally used whichconsist of nine equal legs, each leg having a length equal to the radius of the search area. The first leg isusually down drift. Although the center of the search area is covered very well, the outer limits of the areaare not covered as well.

If you complete the first search of second search of the Sector search patterns with no results, considerusing another pattern, i.e., Square or Parallel for more uniform area coverage. If a second sector searchis performed, shift the pattern 30 degrees to the right. For coverage factor and POD calculations the trackspacing of a Sector search is considered to be one-half the radius.

Barrier Search Pattern:

A Barrier (B) search pattern is used in an area where a strong current exists. The search area lies alongthe path of the current. There are three versions of this pattern:

1) Advancing

2) Stationary

3) Retreating

Select the radio transmission proword associated with distress, urgency, and safety:

1) Distress = MAYDAY

Conveys craft or person is threatened by grave or imminent danger and requires immediate assistance.

2) Urgency = PAN PAN

A station (craft or person) has a very urgent transmission concerning the safety of a craft or person.

3) Safety = SECURITE

A station (craft or person) is about to transmit a message concerning safety of navigation or giveimportant meteorological warnings.

List the three on scene SAR frequencies:

1) 282.8 MHz UHF Joint/combined on scene SAR and DF.

2) 156.3 MHz VHF-FM merchant ship and Coast Guard on scene SAR, (Ch 6).

3) 123.1 MHz VHF-AM International voice on scene SAR.

Select the required time interval for SITREP submission:


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SITREPS should be submitted as soon as details of the case become clear and at least every 04 hoursduring operations.

SITREPS should contain the following information:

1) SITREP Number

2) Situation 3) Action Taken

4) Future Plans

5) Amplifying Information

6) Case Status

Select the assignment responsible for development of the Search Action

Plan:

The Search Action Plan is normally developed by the SMC and is used to formally pass action required ofSRUs and other agencies actively involved in the SAR mission.

The Search Action Plan contains the following:

1) Situation

2) Search Area

3) Execution

4) Coordination

5) Communication

6) OSC reports to SMC

State the type of ELTs/ EPIRBs which use a coded ID:

Emergency Locator Transmitters (ELTS) on aircraft and Emergency Position

Indicating Radio Beacons (EPIRBs) on ships are designed to allow satellites to track and signal RCCsconcerning units in distress. All emergency transmitters will have a homing signal on 121.5 kHz or 243.0MHz. Though the new 406 emergency transmitters communicate with the satellites using adata burstmethod, on scene units can still locate them by use of direction finding equipment tuned to their homingfrequency. The new 406 transmitters send a coded ID signal to the satellite, which is in turn transmitted,to a ground station. Controllers can check the ID against a registration list and then call the owner toensure the unit is actually in distress.

State the procedure you use to establish the initial search area:

The procedure for establishing the initial search area is located in the National SAR Manual Section 2. F.

State the correct initial response search pattern:

1) Surface SRUs should use expanding Square (SS) when there is little or no other information.

2) Surface SRUs should use sector Search (VS) or Expanding Square (SS) when there is a high degreeof confidence in DATUM.

State the information the OSC should pass to the SMC in the first SITREP:


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On scene weather conditions

Determine the correct initial track spacing for a SAR situation:

1) When the search object is a PERSON IN THE WATER the SRUs should use a Track Spacingof 0.1 nm or 200 yds.

2) When the search object is a Vessel less than 15 ft, in winds less than 15 kts and seas lessthan 3 ft. the SRUs should use a 0.5 nm Track Spacing.

3) When the search object is a Vessel less than 15 ft, in winds greater than 15 kts or more, seas3 ft or greater the SRUs should use a 0.2 nm Track Spacing.

4) When the search object is a Vessel 15 ft or greater in length, in winds less than 15 kts, seasless than 3 ft the SRUs should use a 1.0 nm Track Spacing.

5) When the search object is a Vessel 15 ft or greater in length, in winds 15 kts or more, seas 3 ftor greater the SRUs should use a 0.5 nm Track Spacing.

List the characteristics of the SRU best qualified to be an OSC:

1) Long Endurance

2) Excellent Communication Capability

3) Knowledgeable Crew

4) Adequate manning to handle the additional workload

NOTE: If you happen to be the first unit on scene, you will, by default, be acting as the OSC until a better-qualified unit arrives.

Identify the proper use of the Maritime Assistance Request Broadcast:

In a Non-Distress SAR case when alternate assistance is unavailable or cannot be on scene within 1hour or less, a Maritime Assistance Broadcast can be made to determine if someone in the area cancome to the mariner's assistance.

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Search and Rescue Fundamentals