Lowrance M56 S/Map Fish-finding Sonar & Mapping GPS Installation and Operation Instructions

About this manual

This document serves as the official Installation and Operation Instructions for the Lowrance M56 S/Map, a combination fish-finding sonar and GPS receiver. It covers the complete setup process, including transducer installation (shoot-thru-hull and transom mount), power connections, and mounting the sonar unit in-dash or as a portable unit. The guide also details how to use the device's advanced features such as ASP (Advanced Signal Processing), FishReveal, and various alarm settings.

What's inside

• Capabilities and Specifications
• Transducer Installation
• Power and Cable Connections
• Basic Sonar Operation
• Sonar Options & Other Features
• Basic GPS Operations
• Advanced GPS Operations
• System & GPS Setup Options
• Searching
• Sonar Troubleshooting

Specifications

Frequently asked questions

What is the purpose of the M56 S/Map unit?

The unit is designed to function as both a fish-finding sonar and a mapping GPS receiver.

How should the transducer be mounted?

The manual covers both shoot-thru-hull and transom mounting options for the transducer.