You place your supports against the
hull wherever there are internal bulkheads. If you do not know where the bulkheads are located, just walk along the
hull and tap the hull with your knuckles and use your ear. The same applies to where you have the crane or travel-lift slings located when taking the
boat out the
water - only where the bulkheads are located. On other way is to look in the owners manual. If you do not have an owners manual, join the
Leopard Catamaran Group on Yahoo Groups - PDF copies of the
manuals are available on the group site.