But having said that I certainly have to agree with bert on this one, it would seem logical that a real sub would ping the ara it's about to surface at before revealing itself (although saying that, can't subs use hydrophones to hear moving surface vehicles?)
Speaking as someone who used to be on subs as a radioman - no. When you come up to periscope depth the sonar guys should already have an idea of the contacts in the area. Periscope goes up for a quick look around and when it does you also get approximate ranges, bearings, etc. to any radar contacts. (Not radar that you send out, radar that's intercepted from surface ships or aircraft.) Then you could surface. Although 99.9% of the time you'd just sit at periscope depth and do everything through the scope anyway - surfacing is every bit as stupid as pinging or transmitting radar. Unless you're going into port.
Anyway, like the guy above me said, what a real sub would do hardly matters anyway. Besides, if a real boomer was launching they wouldn't be surfacing at all.
