(CNN) -- Two fishermen remain missing after a commercial fishing vessel went down in frigid, treacherous waters off the Aleutian Islands about 1,400 miles southwest of Anchorage, Alaska. The fishing vessel Courageous helps search for missing men in waters off Alaska. A search for the two crew members of the 93-foot Katmai resumed at daybreak Friday. An e-mail sent by the doomed fishing boat to a nearby vessel said it was taking on water in the rear, where the steering was housed, the Coast Guard told The Associated Press on Thursday. Four of the boat's crew members were rescued and five bodies retrieved Wednesday near the Amchitka Pass, a strait that connects the Bering Sea to the Pacific Ocean.
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NEW: Search resumes for two fishermen lost in frigid waters off Alaska
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Distressed boat had sent e-mail that it was taking on water
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Four fishermen rescued; five bodies have been recovered
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CFO of company: We "are praying that those that are still in the water are alive"
The signal originated from a wall-mounted satellite positioning device on the @placeholder that reacts when it's touched or splashed with water, Coast Guard Petty Officer Levi Read said.