VHF Noise Filter

[BubbleHeadMd]

The PO of my boat has tied the VHF and the depth finder to the same battery, independently fused with in-line fuses, not running through the fuse block.

When the depth finder is running, the electronic pulses bleed over into the VHF, rendering it near useless with rythymic bursts of static. The squelch must be jacked up to the point that I would totally miss an incoming call.

Is there some kind of small, in-line noise filter I can buy to put on the hot wire, or should I simply move the VHF to the other battery? I really don't want to split loads though.

Any thoughts?