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Pub. 988-0152-28A
M52 Pro
Fish-finding Sonar & GPS Plotter
Installation and Operation
Instructions
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Copyright © 2008 Navico, Inc. All rights reserved. ® Lowrance is a registered trademark of Navico, Inc. Marine-Tex ™ is a trademark of Illinois Tool Works Inc. Lowrance Electronics may find it necessary to change or end our policies, regulations, and special offers at any time. We reserve the right to do so without notice. All features and specifications subject to change without notice. All screens in this manual are simulated. For free owner's manuals and other information, visit ou
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Table of Contents Section 1: M52 Pro Specifications ......................................... 5 How to use this manual: typographical conventions .................. 6 Section 2: Installation & Accessories.................................... 7 Preparations .................................................................................. 7 Transducer Installation ................................................................ 7 Recommended Tools and supplies................................
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Split Zoom Sonar Chart .......................................................... 48 Digital Data/Chart .................................................................. 48 Flasher ..................................................................................... 49 Pro Tips........................................................................................ 49 Sonar Simulator .......................................................................... 49 Stop Chart....................
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Reset Options............................................................................... 90 Screen Contrast and Brightness ................................................ 90 Set Language............................................................................... 91 Set Local Time............................................................................. 91 Show WAAS Alarm ..................................................................... 91 Software Version Information.........
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WARNING! A CAREFUL NAVIGATOR NEVER RELIES ON ONLY ONE METHOD TO OBTAIN POSITION INFORMATION. CAUTION When showing navigation data to a position (waypoint), a GPS unit will show the shortest, most direct path to the waypoint. It provides navigation data to the waypoint regardless of obstructions. Therefore, the prudent navigator will not only take advantage of all available navigation tools when traveling to a way- point, but will also visually check to ma
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Section 1: M52 Pro Specifications General Display: ............................High-contrast Film SuperTwist LCD. Diago- nal viewing area: 3.5" (8.9 cm). Resolution: ......................160 pixel x 240 pixel resolution; 38,400 total pixels. Backlighting: ..................LED backlit screen with multiple lighting lev- els; backlit keypad. Input power: ...................10 to 17 volts DC. Current drain:................170 ma lights off; 240 ma lights on. Case size: ....................
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GPS Receiver/antenna: .........Internal 12 parallel channel GPS/WAAS. Position updates:...........Every second. Position points:..............1,000 waypoints; 1,000 event marker icons. Man Overboard:.............MOB feature precisely marks man overboard location with special icon, then automatically displays navigation data to that position. Audible alarms:..............Arrival/off-course/destination passed/anchor. Graphic symbols for waypoints or event marker icons:..................4
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Section 2: Installation & Accessories Preparations You can install the sonar and GPS systems in some other order if you prefer, but we recommend this installation sequence: CAUTION: You should read over this entire installation section before drill- ing any holes in your vehicle or vessel! 1. Determine the approximate location for the sonar/GPS unit, so you can plan how and where to route the power/transducer cable. This will help you make sure you have enough cable length for the desir
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Remember, the transducer location and installation is the most critical part of a sonar installation. Recommended Tools and supplies If you prefer the option of routing the cable through the transom, you will need a 5/8" drill bit. NOTE: The following installation types also call for these recommended tools and required supplies that you must provide (supplies listed here are not included): Transom installation Tools include: two adjustable wrenches, drill, #29 (0.136") drill bit, flat
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3. The transducer should be installed with its face pointing straight down, if possible. For shoot-thru applications: Many popular fishing boat hulls have a flat keel pad that offers a good mounting surface. On vee hulls, try to place the transducer where the deadrise is 10 ° or less. Deadrise less than 10 ° Strakes Pad Left, vee pad hull; right, vee hull. A pod style transducer is shown here, but the principle is the same for Skimmers inside a hull. 4. If the transducer is mounted o
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Transom Transducer centerline Hull bottom Align transducer centerline with hull bottom. However, there are times when you may need to adjust the transducer slightly higher or lower. (The slots in the mounting brackets allow you to loosen the screws and slide the transducer up or down.) If you fre- quently lose bottom signal lock while running at high speed, the trans- ducer may be coming out of the water as you cross waves or wakes. Move the transducer a little lower to help prevent this.
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Second, the transducer angle cannot be adjusted for the best fish arches on your sonar display. (This is not an issue for flasher-style sonars.) Lack of angle adjustment can be particularly troublesome on hulls that sit with the bow high when at rest or at slow trolling speeds. Third, a transducer CAN NOT shoot through wood and metal hulls. Those hulls require either a transom mount or a thru-hull installation. Fourth, if your Skimmer transducer has a built in temp sensor, it will only sh
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Reassemble the transducer and bracket and place them against the transom. Again, check to see if you can move the transducer so it's parallel with the ground. If you can, then go to step 3. If it doesn't, repeat step 2, but use a different alignment letter until you can place the transducer on the transom correctly. Ratchets Insert bolt and check transducer position on transom. 3. Assembling the transducer. Once you determine the correct posi- tion for the ratchets, assemble the transd
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Transom Transom Position transducer mount on transom and mark mounting holes. Side view shown at left and seen from above at right. 5. Attaching transducer to transom. Remove the transducer from the bracket and re-assemble it with the cable passing through the bracket over the bolt as shown in the following figures. Route cable over bolt and through bracket. Side view shown at left and seen from above at right. Attach the transducer to the transom. Slide the transducer up or
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6. Route the transducer cable through or over the transom to the sonar unit. Make sure to leave some slack in the cable at the transducer. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from the engine's wiring, bilge pumps, VHF radio wires and cables, and aerators can be picked up by the sonar. Use caution when routing the transducer cable around these wires. WARNING: Clamp the transducer cable to the transom close to the transducer. This c
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3. Route the transducer cable alongside the trolling motor shaft. Use plastic ties (not included) to attach the transducer cable to the troll- ing motor shaft. Make sure there is enough slack in the cable for the motor to turn freely. Route the cable to the sonar unit and the trans- ducer is ready for use. TRANSDUCER ORIENTATION AND FISH ARCHES If you do not get good fish arches on your display, it could be because the transducer is not parallel with the ground when the boat is at rest in
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SHOOT-THRU-HULL PREPARATION Hulls With Floatation Materials The transducer installation inside a fiberglass hull must be in an area that does not have air bubbles in the resin or separated fiberglass lay- ers. The sonar signal must pass through solid fiberglass. A successful transducer installation can be made on hulls with flotation materials (such as plywood, balsa wood or foam) between layers of fiberglass if the material is removed from the chosen area. See the figure below. WARNING:
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Transducer location Transducer location (trolling speed) (high speed) Shoot-thru-hull transducer locations for high speed or trolling speed operation. To choose the proper location for shoot-thru-hull mounting, follow these testing procedures: (You may need a helper to complete these steps.) 1. Anchor the boat in about 30 feet of water. Add a little water to the sump of the boat. Plug the transducer into the sonar unit, turn it on, then hold the transducer over the side of the boat in
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3. Now move the transducer around to find the best location with the strongest possible bottom signal. If you find a spot with an acceptable bottom signal, mark the location and move on to step 4. If you can't get an acceptable bottom signal, try turning up the sensitiv- ity by three or five keystrokes and then move the transducer around once more. If you find a spot that works, mark it and move on to step 4. If you have to turn up sensitivity by more than five keystrokes to get a good sig
