Here is the advantage. The lead escort plays leapfrog with the convoy staying far enough a head to use passive sonar...which means rushing a head and then very slow.
If we use active pinging before we see the subs it give away our location.
The subs will pick up the sound of the convoy much quicker than that of a single ship and see the smoke before we see the sub if we don’t have something forward.
The lead ship is listening for submerged subs and looking on the surface and as an advanced radar picket. It is more advance warning than hunter and it only works during the day.
Subs can pick up a convoy by sound and hone in from about 20 miles. The preferred location would be in front of us. They won’t expect us to use passive sonar and they can not lay still in the water.
Does that sound riskier than holding positions and doing nothing?
No gap we go from here to England.
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