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Surf Zone/Beach Zone (SZ/BZ) Obstacle Reduction

Surf Zone/Beach Zone (SZ/BZ) Obstacle Reduction. Capt R.W. Paterson. The Threat. 50 m. 384 m. 10 m. 10 m. 15 m. 20 m. 30 m. 30 m. 10 m. 20 m. 30 m. 10 m. AT mines (A, B, F, G, H). 4 strand fence. Tanglefoot. 0.6 m. 1.8. 0.9 m. 1.1 m. 1.3 m. AP mine (K). 0.3. 1.2 m. 1.6 m.

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Surf Zone/Beach Zone (SZ/BZ) Obstacle Reduction

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  1. Surf Zone/Beach Zone (SZ/BZ) Obstacle Reduction Capt R.W. Paterson

  2. The Threat 50 m 384 m 10 m 10 m 15 m 20 m 30 m 30 m 10 m 20 m 30 m 10 m AT mines (A, B, F, G, H) 4 strand fence Tanglefoot 0.6 m 1.8 0.9 m 1.1 m 1.3 m AP mine (K) 0.3 1.2 m 1.6 m 3.0 m AL Mines (E, L) Triple Strand Concertina Wire w/AP mines Water Depth (m) Profile At Mean Tide. 6-8 ft Tidal Variations (+3-4 ft about mean tide) Type 2 AL Mines (J, M) Hedgehog 1.25-m members Sea Urchins 10 m 15 m 10 m

  3. Background • Currently no program of record to deal with SZ/BZ obstacles • PGMs thought to hold some promise for a near term solution (tied to USAF support) • Began working this problem in Germany • Invited to be part of the IPT for JDAM Assault Breaching System (JABS) • Incorporating results from live fire tests

  4. The Skeptics • “This is a physics problem” • “Agent based tools won’t work” • “It’s just too hard”

  5. Physics • Mathematical representation of the behavior of the natural world • Newton’s Laws of Motion • Einstein’s Theory of Relativity • We have physical results from live fire tests

  6. Surf Zone Tests Mk 82 Pond Test – Half Buried (March 2002) • Bomb Buried to ½L • Water Depth of 3 Feet Arena #1 Arena #2

  7. Surf Zone Tests Mk 84 Pond Test – April 2002 Plume • Note - M5 and M4 moved towards the bomb

  8. 1,000 All Data Sources I>200 and P>18 26/27 Neutralized Survived Killed 100 10 1 1 10 100 1,000 10,000 Normalized Impulse Mine Vulnerability to Explosive Neutralization VS 1.6 Anti-Tank Mine

  9. Mine Type Bomb A Bomb B Bomb C 6’ 3’ 6’ 3’ 6’ A 20* 14 24 16 31 Depth Depth Depth Depth Depth B 10 9 14 10 19 F 17* 12 21 14 28 G 17 12 21 14 28 H 17 12 21 14 28 MK 80 Series Bombs Predicted Lethal Radius (Feet) for Mines** * Killed out to 21 feet in summer 2000 tests ** Testing on-going

  10. The Physics Behind the Problem More Mines Killed KILL 2-3 M 6 ft. ~ 5O’ MVMT 30’ KILLED More Mines Moved ~

  11. Agent Based Distillations • Digital Mathematics used to simulate the simplified behavior of our human and natural world • Question: Can agents that represent physical objects (mines) and not people be given behaviors that simulate physics

  12. Pythagoras ScenarioUsing Sample Data EFVs Obstacle Belts Deep Water Shallow Very Shallow Shore Aim Points for 2000 lb JDAM

  13. Questions • Can well placed Mk 80 series bombs effectively create assault lanes? • How precisely must landing craft navigate given varying assault lane widths? • How does the knowledge of obstacle location affect clearance? • How many sorties need to be flown, how many weapons need to be dropped?

  14. New Questions from the Week • What tactics need to be employed against varying threats? • Channeling • Belt strikes • Point strikes • JDAM versus standard Mk-80 • How do we create the output we need?

  15. What is Happening

  16. Biggest Surprise • Cost of Jack and Coke at Rocky Point • $12 • Dinner for 9 at Rocky Point • $453 • Unexpected discovery that LESS precision is better • Priceless

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