GWX little BUG?

[mauriga]

Hi mates,
1st of all, sorry 4 our poor English (my daughter helped me)!

This is the matter...
During a patrol, few Kms north of Alexandria, I met two costal vessels (schooners).
The very strange thing was that, while I didn't hear any sounds by the hydrophone, my sonarman reported to me the contacts of both the schooners.

I wonder if the schooners were sailing with or without engines;
in the 1st case I should have heard them, in the 2nd case my sonarman shouldn't have.

Tnx 4 coop.

mau----