In larger operations such as Jubilee, Torch, Husky, and Overlord, LCAs were carried to invasion areas by Landing Ship Infantry (LSI). The location chosen for the LSI to stop and lower the LCA was a designated point inside the 'Transport Area' when the LSI was operating with a US Navy Task Force, or the 'Lowering Position' when with a Royal Navy Task Force. The transport area or lowering position was approximately 6–11 miles off shore (11 miles was amphibious doctrine for the USN by mid-war, while the RN tended to accept the risks associated with drawing nearer shore). Normally landing ships were fitted with heavy-duty power-operated davits. Early landing ships were fitted with Welin-McLachlin davits – these being generally in use in the Merchant Navy for standard 99 man lifeboats. As the weight of LCAs increased through the war (eventually approaching 14 tons) heavier davits were required. Later LSIs and those being refitted were provisioned with luffing davits of a crossbeam type. The davits themselves provided a demarcation between the responsibilities of the LSI crew (either Royal Navy or Merchant Navy) and the members of the LCA Flotilla.