Humminbird Side Imaging Forums

General => General Discussion => Topic started by: Jolly Roger on June 08, 2009, 09:19:11 AM

Title: Depth alarm triggered by heavy rain??
Post by: Jolly Roger on June 08, 2009, 09:19:11 AM

Hi all,
went out two days ago to do some scanning close to shore and had the depth alarm set to a depth of 2 metres. After a while dark clouds started to close in from South West and within the next 15 minutes a major thunder storm passed over. Visibility dropped to less than 50 metres. I wasn't scared at all, but forgot to take pictures.
All of a sudden the depth alarm started to sound off, allthough I was still in waters with at least 10 metres depth. Whenever I acknowledged the alarm, it started again after a couple of seconds, so I finally turned the alarm completely off.
I wondered if the alarm was triggered by the heavy rain.
Has anyone experienced something like this as well?

Regards from Germany
Harry

Title: Re: Depth alarm triggered by heavy rain??
Post by: Humminbird_Greg on June 08, 2009, 10:20:46 AM

Harry,
Any chance that the depth could have jumped up to a reading less than 2 meters deep?  This could be from wave/wind action or even from the increase in the surface clutter from the hard rain.

Title: Re: Depth alarm triggered by heavy rain??
Post by: Jolly Roger on June 09, 2009, 07:22:53 AM

Hi Greg,
I guess that it was caused by the surface clutter (noise?) from the heavy rain, because it was really heavily pouring down. There was even hail coming down.
The wind and waves weren't that bad, 'cause I was in the lee of a peninsula.

Regards Harry