So we are two who speak not easily english... I'm here as a novice in yachts design... I started design some river boats as spits, but with them the sea cruising is limited... I think they're not suitable for the sea... Boating is great, but staying in inland waterways is not so funny... So, is it possible to create a boat with a length limit of 38m, a beam limit of 5m and a draft limit of 1.80m, who is able to cruise in sea? Just another question... Which shipbuilding softwares do you know?