While it had been tested on a few VIIs previously, snorkel operations were still relatively new at that time. U-297 was among the first snorkel boats lost.
If the estimated speed is even close to accurate, I'd be inclined to believe the scopes were down. Especially considering the Sunderland's first atack run failed to release any depth charges and still went undetected by U-297.
If someone had been on the scope, I'd certainly believe they would have noticed the big plane either coming or going.
Inexperienced crew, utilizing new equipment with untested operation procedures.
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In the month of July of the year 1348, between the feasts of St. Benedict and of St. Swithin,
a strange thing came upon England...
My U297 build thread
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