The PING is supersonic. So why do we hear it?

[Vikinger]

Originally Posted by Engel der Vernichtung

Possibly better picture for dipping sonar.

Basically, to do this, the helo stops and hovers a few meters above the water, then lowers the sonar probe, and listens. If they hear something susupicious, then they go active, and try to immediately locate the sub. If they don't hear anything, they winch in the probe, fly over a few hundred meters, and try again (usually also being given steering commands by the ship they're operating from; the ship's sonar, being a lot bigger is also a lot more sensitive, and between the two they can pinpoint a sub pretty quickly). Usually helos in this mission are armed with 2 homing torps.

Yeah its a better illustrating picture .

A bit off topic but i remember when i was in the Swedish Army and the russian submarine went aground on an small island in a military secured area.

After that incident the Swedes saw submarine everywhere and hunted them like maniacs in the archipilago.

I was on watch duty on my regiment when we got a call and they sent our platoon in as reinforcment. Mainly to secure some bridges and roads along the coast.

I was placed on a small bridge whit some mates. We got sharp ammo and a few handgrenades. It was quite thrilling , specially in the night where both sound and movement can play trick on your mind.

We had order to use our weapon if we had to.

But to make a long story short. We never saw or heard any indication of hostile activity but some guys managed to kill a few ducks and swanes. They thought they saw some scubadivers in the water and throw a few handgrenade at them.

But it was a lot of talking about it after wards. Swedish army kill ducks whit handgrenades hehe.

But iam sure that thos guys that threw the grenades did it on purpose to , well, have some fun during the boring patrol.

And the picture i posted is one of thos moments i saw when swedish navy used hellicopters to search for sub activity. So its a real action picture. ( and to clarifie, i did not take the picture but it show how it looked like)

To bad i never saw any sinkbombs attack. They was to far out from where i was stationed. But they dropped quite few of thos barrels.

But it would be intressting to se sharp sinkbombs in action