Updated

Updated · KTVU FOX 2 San Francisco · Jul 15

3 Alcatraz Boat-Capsize Survivors Expected to Leave Hospital After San Francisco Bay Rescue

Updated

Updated · KTVU FOX 2 San Francisco · Jul 15

3 Alcatraz Boat-Capsize Survivors Expected to Leave Hospital After San Francisco Bay Rescue

Q: Two people were seen banging on a window from inside. What prevented their escape from the sinking vessel?

It is not yet known what specifically prevented their escape. The reporting only says early responders saw two people banging on a window from inside the submerged boat. Neither the news account nor the additional reporting explains whether they were blocked by a jammed door or window, trapped by the boat’s rapid flooding, disorientation after the capsize, pressure from the surrounding water, or another mechanical obstruction. What is known is that the vessel appears to have taken on water and capsized quickly in rough, cold Bay conditions, with strong currents and wind. In that kind of fast-moving sinking, escape can be hindered by the boat rolling over, interior spaces flooding suddenly, and exits becoming difficult to reach or open underwater. But those are general possibilities, not confirmed facts in this case. Authorities have said the cause of the sinking remains under investigation, so any more specific explanation for why those two people could not get out would be speculative at this stage.

Q: A 50-foot pontoon boat capsized during a memorial. What caused this stable vessel to suddenly sink in the Bay?

The boat appears to have capsized after taking on water in choppy Bay conditions, but investigators have not yet identified a single definitive cause. Authorities and witnesses said the 50-foot, three-deck pontoon boat, Volare, was operating near Alcatraz in rough, wind-whipped water when it was likely hit by a wave or otherwise flooded. San Francisco Fire Chief Dean Crispen said the vessel was believed to have taken on water, and witness accounts pointed to a sudden rollover rather than a slow sinking. That matters because pontoon boats are generally stable on calm water but can be vulnerable in open, confused chop. Local mariners said the Bay near Alcatraz can turn especially rough when wind and tide push against each other, creating short, steep waves. Experts also note that pontoon boats sit high, catch wind easily, and can “deck dive” if they meet a wake or wave at the wrong angle or speed, allowing water onto the deck. There are still unresolved questions, including whether the boat was overloaded for the conditions, whether water entered through the deck or hull, and whether the vessel’s three-story design affected stability in the wind. Some boaters said conditions were not extreme, which suggests the exact sequence of events will be important. For now, the best-supported explanation is a combination of rough afternoon Bay conditions and the boat taking on water, leading to a rapid capsize. The Coast Guard investigation is expected to determine the precise trigger.

3 articles · Updated · KTVU FOX 2 San Francisco · Jul 15

Three survivors taken to CPMC Van Ness Campus after a recreational boat capsized near Alcatraz Island were expected to be released Tuesday evening.
Witnesses said the vessel overturned in frigid, choppy San Francisco Bay waters, leaving several people clinging to the hull or struggling in the water amid strong wind and currents.
Nearby boaters reached the scene after hearing a Coast Guard distress call, throwing life jackets and helping pull victims out before official rescue crews arrived; one woman rescued by a civilian captain had a head injury.
Witness accounts also described debris scattered across the bay and said two people were seen banging on a window underwater, underscoring the severity of the capsizing.