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To many possibilities. Low voltage, problem with hydraulic pump, no voltage on hydraulic pump, broken wire, heading sensor etc

Lowrance Boating | Answered on Feb 02, 2019


Loss of depth reading over 15kph, is usually caused by either turbulence from under the chines of the boat, or that the transducer is toe up, or back end up. If the transducer throws up spray, it is back end up. Toe up is harder to see. Get someone to drive the boat and look overboard. The transducer needs to be flat at the speed you want to see the information, and of course that changes depending it you are trolling or on plane and your trim.

Not marking fish could be a faulty transducer or that the sensitivity setting is not set high enough. Read the manual. I am a Humminbird person :>)

Lowrance Boating | Answered on Dec 30, 2018


here is the manual

HDS-5, HDS-7, HDS-5m & HDS-7m - Lowrance

https://www.lowrance.com/.../Lowrance.../HDS-5-7-5M-7M_OM_EN_988-10041-00...Sonar references do not apply to the HDS-5m and HDS-7m GPS only units. Manual Conventions. When you are instructed to press a button in this manual, the ..

Software Upgrades here

Lowrance HDS 5 Software Google Search

and finally Mapping

mapping for Lowrance HDS 5 Google Search

and specifically, INSIGHT

Insight Genesis - Download free Lake, River and Coastal Maps

https://gofreemarine.com/insight-genesis/Make your own maps and download free maps from the community. Insight Genesis' cloud-based software does all the work, automatically processing ... with sonar signals from your existing Lowrance, Simrad or B&G transducer. ... The cloud automatically backs up all your data, protecting against lost or damaged SD cards.

Lowrance Boating | Answered on Nov 13, 2018


Press Waypoint Waypoint, you should only use MOB as a temporary mark.

Lowrance Boating | Answered on Oct 08, 2018

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