Maritime search planning part 1 MILSAR 1 2005

Maritime Search Planning Part Objectives • Maritime search planning theory and various models • Worksheet method of drift planning including a demonstration • Individual exercises using the worksheet • Demonstration of Net Water Movement References National SAR Manual - Chapter IAMSAR Manual - Chapter Search Planning Steps • Evaluate the situation including results of previous searches (intelligence) • Last Known Position (LKP) and error • Estimate the movement of survivors and errors (scenarios) • Calculate datum and the search area for a particular time • Obtain and allocate resources • Rescue plan Datum “A geographic point, line or area used as a reference in search planning” Time specific eg 210000 UTC December Possibility Area “The possibility area is the area in which the missing craft may be located.” • Usually too large to search • A useful boundary for considering intelligence, broadcasts and incoming reports • Maximum limit of fuel and subsequent drift Possibility Area “The possibility area is the area in which the missing craft may be located.” Probability Area “The area in which the missing craft and/or survivors are most likely to be found taking into account possible errors in the navigation of the missing craft and the search craft, together with an allowance for any water movement and a safety factor.” Probability Area Initial Search Planning • Initial SAR response – simple and quick to cover the most likely area • Resources may be limited • Search light may be limited • Time Frame for Survival – Software using SST, sea state, clothing Combine with expert medical advice • Don’t forget the rescue option Formal Search Planning • • • • • • • Initial SAR response unsuccessful Intelligence picture more complete Environment data obtained and applied Mathematical calculation of the search area Wide area grid searches, plan – per day More resources acquired and allocated Don’t forget the rescue option Search Planning Models • Coastal Method • Mathematical Oceanic Models in National SAR Manual* and IAMSAR Manual • Net Water Movement – RCC Australia’s computerised calculation system employing wind, current, tidal and bathymetry data Coastal Search Planning • Suitable for initial SAR response within 25 nm of coast and under 100 metres depth • Use within first hours of distress situation in lieu of formal oceanic model • Creates an initial search area that applies errors to LKP and navigation of search unit plus applied drift (if known) Coastal Search Planning • • • • • • E = √(X2 + Y2) E = √(52 + 12) E = √ 26 E = 5.099 nm E = (5.099)(1.1) E = 5.6 rounded up to nm from Appendix J-1 and J-2 Maritime Search Planning End of Part [...]... bathymetry data Coastal Search Planning • Suitable for initial SAR response within 25 nm of coast and under 10 0 metres depth • Use within first 6 hours of distress situation in lieu of formal oceanic model • Creates an initial search area that applies errors to LKP and navigation of search unit plus applied drift (if known) Coastal Search Planning • • • • • • E = √(X2 + Y2) E = √(52 + 12 ) E = √ 26 E = 5.099... navigation of search unit plus applied drift (if known) Coastal Search Planning • • • • • • E = √(X2 + Y2) E = √(52 + 12 ) E = √ 26 E = 5.099 nm E = (5.099) (1. 1) E = 5.6 rounded up to 6 nm from Appendix J -1 and J-2 Maritime Search Planning End of Part 1 ...Formal Search Planning • • • • • • • Initial SAR response unsuccessful Intelligence picture more complete Environment data obtained and applied Mathematical calculation of the search area Wide area grid searches, plan 2 – 3 per day More resources acquired and allocated Don’t forget the rescue option Search Planning Models • Coastal Method • Mathematical Oceanic