u-boat वाक्य

Mr. president, what do we do if a german u-boat does attack? i agree it's unlikely. but suppose it happens ?
There had been a blazing row while the u-boat was in dock between heer's superior officer and wohl's .
If you were sending a u-boat in to pick up a fugitive spy, what would you think was the nearest sub could safely come to the coast ?
On two or three occasions, notably on october l7, 1914, the alarm was given that there was a u-boat inside the anchorage .
The u-boat should be so effectively countered that our convoys could count with comparative certainty on making a safe atlantic crossing .

The elimination of the three german "aces" in march and the improvement in our defence measures had their effect on u-boat tactics .
The only incidents which occurred to mar the precision of this remarkable concentration were the loss by u-boat attack of three ships in convoy .
In june 1943 the beaten remnants of the u-boat fleet ceased to attack our north atlantic convoys, and we gained a welcome respite .