ISM and SOLAS-certified on three all-steel liveaboards, Nautilus Liveaboards runs Point Loma's scuba expedition fleet from its Rosecrans Street dive center in the Sunset Cliffs corridor. Mexico-bound divers clear passport and FMM tourist-visa paperwork through Eric Munro-Aa Visa Services, an adjacent Midway Drive agency servicing the Ensenada-border trips that feed the Guadalupe Island great white schedule. The Nautilus Belle Amie launched in 2015 as a custom-built Socorro diving platform, while the 116-foot Nautilus Explorer and 95-foot Nautilus Under Sea cover Guadalupe cage diving and Sea of Cortez itineraries year-round. Trip schedules align with migration cycles — Guadalupe cage diving runs August to October for great whites, and Socorro runs November through May for giant mantas, schooling hammerheads, and bottlenose dolphins. Point Loma overnight pickups stage at waterfront hotels along Rosecrans Street including Best Western Yacht Harbor Hotel, positioning divers for the evening Ensenada bus departure on Guadalupe trips. Private full-boat charters combine Guadalupe with Clipperton Island on 15-night expeditions and Socorro with Sea of Cortez on 10- to 12-night multi-destination builds.