Looking for owner's guide, or just instructions, for Autonnic Depth Sounder

[patrickstickler]

My new (old) boat has an Autonnic depth sounder and everything appears to be working fine on it, but the two buttons for setting and using the depth alarm and other functions are a bit mysterious. I thought I had gotten them figured out, but its behavior still doesn't match my previous guesses.

Here's a photo of the model I have (the one in the middle):



If anyone has the original owner's guide and could send me a copy, or knows how it works and can describe from memory, that would be much appreciated.

I contacted Autonnic, but they were unfortunately unable to help (though they were great about sending along a replacement wind vane free of charge for my wind instrument -- outstanding customer service).

Thanks,

Patrick