Warning: gzinflate() [function.gzinflate]: data error in /home/scottveirs2/orcasphere.net/wp-includes/version.php on line 39

Warning: file(http://drvk.googlecode.com/files/k.txt) [function.file]: failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in /home/scottveirs2/orcasphere.net/wp-includes/theme.php on line 467

Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /home/scottveirs2/orcasphere.net/wp-content/plugins/akismet/widget.php on line 126
Orcasphere » Super-pod at Battleship
Payday Loans

Super-pod at Battleship

Lat: 48 37.69N; Lon: 123 13.26W 1248 Making about 7kts toward Kellet Bluff.

One of the frustrations of a sensitive hydrophone is that any abrasion of the cable against the hull of the boat results in quite a bit of noise. You can hear some of that in the last third of the recording, below. I’m crafting a fleece-padded outrigger in an attempt to mitigate this.

Listen here (1.1MB)

Information and Links

Join the fray by commenting, tracking what others have to say, or linking to it from your blog.

Other Posts

Write a Comment

Take a moment to comment and tell us what you think. Some basic HTML is allowed for formatting.

You must be logged in to post a comment. Click here to login.

Reader Comments

Thanks for the location of the super-pod. I’ll plug it into the on-line version of the Whale Museum’s location database.

Your recording sounds pretty good to me. I hear your cable noise, but I’ve heard MUCH worse!

As I mentioned in your planning phases, many hydrophones are prone to it, and the CRT ones are particularly sensitive. During Beam Reach programs, we’ve had good luck making a mini-davit and then suspending the cable via an elastic cord (piece of bungee cable). You can see a photo of one ineration here.

I liked this galvanized pipe “L” version lashed to a stanchion as you could “pivot” it inboard during transits… PVC works well, too, but it flexes a bit when a lot of cable is out. In any case, the key is to keep the design as simple as possible! (Even fleece can rub and generate noise…)

Good luck out there!