Sonar image of submarine S5

[raalst]

have a look at this website.

would have been a nice entry for the "guess this sub"
contest, don't you think

Regards,
Ronald

[novagator]

How does a sonar see

How does a sonar see shadows?

[koeze]

Basically a sonar measures the

Basically a sonar measures the time it takes for a pulse of sound to be reflected off of an object. Multiplying time and speed of sound gives a distance to that object. (See for example the parking radar in cars)

More advanced sonars can create a picture from the reflections of the sound pulse. When sound is bounced off of an object there is nothing that goes beyond that object (the signal is reflected back to the receiver). Therefore the a "shadow"is formed behind the object as if it was flooded in spotlight.

For more information check for instance
Klein Sonar sidescan sonar


EJK

[novagator]

Thanks for the explanation.

Thanks for the explanation.

[carcharadon]

I used to run side

I used to run side scan sonar surveys for MMS (minerals management service) in the GOM (gulf of mexico). With high resolution (lots of detail) you had to run a narrow path. Less detail wider. I've seen images of a bicycle tire showing spokes. We surveyed mostly for pipe placement to the oil rigs, and debris left after a job etc.

[carcharadon]

Here are the guys I

Here are the guys I worked with


http://www.pastfoundation.org/U166/FIndingU166.htm