First 460EXP Explorer Launches At SanLorenzo Italian yard SanLorenzo has launched the first hull in the new 460EXP; Explorer line. Despite having the series title 460EXP, it does not designate her length but rather her Gross Tonnage because she is actually 42.2-meter LOA. The 460EXP presents an elegant solution for owners who want a practical yet stylish option in an explorer-type motoryacht. With a steel hull and aluminum superstructure, she carries all her weight in the right place. The superstructure is set far forward allowing for the aft main deck to be free for tender and toy storage. In fact, the 460EXP is capable of carrying a tender of up to 33-feet.