It is quite precise around 5-10 cm at distance of 10 m. The up distance is only limited by the output power of the device and the speaker.

This program can be use in air or in water but in water you need external microphone and speaker closed in water proof case.

The main window toolbar contains the most important functions: send one chirp, sonar loop and analyze window. More advanced functions are hidden under settings menu.

Additionally program is equipped with testing functions which helps to tune the parameters crucial for the Sonar CE application.

For Pocket PC 2003 users, please download this software here (190 KB) or its mirror here.

For more information about this software, please refer to the source link below.

Update Description:
v1.19:
- Enter button starts the chirp.

v1.18:
- Has new sound system test for frequency spectrum analyzing. This can be used not only for sonar tests but in general for your amplifier, speakers and so on.

***** [Jun 28, 2008] by Andrew using AT&T Tilt
Amazing. Worked for me perfectly an I'm having so much fun with it. Thank you.

** [Mar 24, 2008] by deckard using xda orbit2 ( htc polaris)
Bleeps away but get blank screen, no fancy sonar.

**** [Mar 19, 2008] by trids using htc tytn2 / kaiser
I have it running on my WM6 device, but you have to fiddle a bit to tune it to your hardware: especially in "Settings \ Set offset". Probably will work a lot better when a WM6 version is available ;o) .. But meantime, really promising!

*** [Mar 8, 2008] by dave using hp ipaq 3950
Well it doesn't work here. I can't get it up and running. I hear strange noises and stuff but I can't see anything on my screen. I only see black screen no sonar.

***** [Jul 22, 2007] by Peyman using Samsung i730
This program is buttkicking, awesome, hard to resist, I love it, it produces sound frequencies upto 10 meters and find the obstructions, just like a sonography in medicine. COOOOL.

* [Jul 18, 2007] by Mike from Italy using Asus MyPal A639
I think this utility doesn't work on WM5, crashes system as soon as I launch it, so I have to soft reset the pda every time. The only solution was to remove it from my Pocket PC.

** [Jul 9, 2007] by Thomas using XDA mini (HTC)
Anyone else tried out this prog. Seems that it doesn't work the it should or could. Many Bugs and the Help doesn't work. The idea itself is great and it would be nice to try out a version working.