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Damage Control and Repair Seattle Safety at Sea Seminar 25 Feb 2012 Paul H. Miller, D.Eng. P.E. Professor of Naval Architecture United States Naval Academy
When Things Go South… • Dismasting • Steering loss • Flooding • Grounding • Structural damage • Keels • Collisions
Dismasting • Is everyone OK? • Is the broken rig an immediate danger? • Jettison or secure? • Establish communications • Motor or jury rig? • Distance to nearest safe port?
Steering Loss • Communicate to those nearby! • “No steering!” • Slow the boat down (drop sails, engine in neutral) • Repairable? • Jury rudder – prefabricated or Macgyver it? Spin pole plus floorboards is a possible option
Flooding: Optimist or Pessimist? • How fast?!! • Find source • Hose, seacock, • Shafts, head • Communicate! • Plug and Bail • Sailboats can float with a lot of water • Intentional grounding?
Grounding Hard or soft bottom? Damage? Tide status? Wait or take action? Kedge/Mast Pull
Case Study! It was a dark and stormy night… You get a radio call. What would you do?
Collisions The first goal is to avoid them! Maintain situational awareness!
Collisions Is everyone OK? Look for water ingression Heel and patch/plug Communicate Think before separating boats
Some Boats Are Better Built Than Others Traditional Cored Composite vs Modern Toughened
Allisions(collisions with fixed objects) • Maintain situational awareness! • Don’t forget your GPS is quite accurate! What would happen if they backed away?
Keel Loss Unfortunately all too common today. Routine, appropriate inspections are critical, both in and out of the water.
Keel Loss (0. Are we still upright?!) • Is everyone accounted for? • Communicate to SAR Coordinator (will your radio still work?) • Prepare to abandon ship • Evaluate the risk/reward of staying or abandoning
Watertight Integrity Lost • Reduce speed immediately! • Minimize water over the deck • Communicate! • Repair ASAP!
Big Picture • Boats are fairly tough and can take a lot of damage • Establish communications ASAP • Evaluate situation for best options