For the tourist routes should be reserved well in advance. Operate various shipping lines. The stronger Navimag (www.navimag.com), whose ferries connect to Puerto Natales, Puerto Chacabuco and San Rafael Glacier. Another company that operates San Rafael is Skorpions Cruises (www.skorpions.cl). So does Patagonia Connection SA (www.patagoniaconnection.com). To "jump" to Chaitén have to book with Naviera Austral (www.navieraaustral.cl). From December to February is high season in Chile, take care!