ANCHORAGE, Alaska (AP) — A pilot flying in rapidly deteriorating weather in Alaska confused snow on a mountain with a body of water before crashing a floatplane with 10 passengers onto the rocky mountainside, a preliminary report released Wednesday says.

All 11 people on board the morning flight survived the July 10 crash of a Taquan Air charter flight on Prince of Wales Island near the southern tip of the Alaska Panhandle. Six people suffered serious injuries.

The pilot told an investigator that visibility decreased rapidly from about 3 to 5 miles (5 to 8 kilometers) to nothing while the...