Following the Inter-Service Training and Development Centre’s (ISTDC) successful development of the infantry carrying LCA, attention turned to the means of efficiently delivering a tank to a beach in 1938. Inquires were made of the army as to the heaviest tank that might be employed in a landing operation. The army wanted to be able to land a 12-ton tank, but the ISTDC, anticipating weight increases in future tank models specified 16 tons burthen for Mechanised Landing Craft designs. Another governor on any design was the need to land tanks and other vehicles in less than approximately 2 ½ feet of water.