Lowrance X510C Manual Download

Hi Rick

There is only one transducer. for speed/temperature. From page 2 of the owner's manual (see link below)
"A single-frequency with built-in temperature
sensor is packed with the X-510c"

Hope this helps and happy boating!
-Steve


http://www.lowrance.com/Root/Lowrance-Documents/X515cDF_X510c_0151-451_120406.pdf

If you turn on the "fish I.D. mode" in your sonar options then you will be able to turn on the fish alarm as well. Lowrance HDS 5x Gen2 Fishfinder
This a link to a pic file for your owners manual.
Go to page 67 to, see how to access and enable/disable alarms for your unit.

Hello. Your observation is spot on and it is actually a characteristic that is always true when using sonar. Yes, your Lowrance uses the same sonar as a nuclear powered submarine does. The two factors you focus on, water depth and boat speed are perhaps, the two biggest factors when it comes to the quality of the fishfinder. The boat's engine should be in gear at an idle or just above. Experiment with your boat to find the best throttle location for good arches. Usually, a slow trolling speed works best. The depth of the fish can determine if the fish will arch on the screen. If the fish is in shallow water, the fish is not in the cone angle very long, making it difficult to show an arch. Typically, the deeper the fish, the easier it is to show an arch.
If you would like a complete tutorial on Lowrance sonar, go to this link. Enjoy. http://www.lowrance.com/Support/Tips-and-Tutorials/Sonar-Tutorial/

Are you looking for the little fish symbols?
Press MENU, down arrow to SONAR FEATURES and press ENT. Arrow to FISH SYMBOLS and press ENT. Press EXIT twice. Any significant return in the water will now show up as a fish symbol.

Are you looking for the fish arches?
You won't get any arches unless the boat is moving and of course there are fish passing within the transducers signal. The shallower the water, the less area you are covering and less likely to get a fish return.

There is an OK guide to understanding what you see on the sonar screen at the link below. It if pretty technical but parts of it may help you out.

http://primus.lowrance.com/support/resultDisplay.do?gotoLink=5&docType=1000&contextId=351%3A5.47%2C11918.11930%2C22.47&clusterName=ClusterPublic&lang=english&docset=%2FDocuments%2FSonar&contentId=9de88fa2-0b60-4b44-a470-29ee14767b3e&responseId=135ccbe2cfd4f608%3A1fe88d%3A122773df7e0%3A7c2&groupId=4&answerGroup=1&score=981&page=http%3A%2F%2Fprimus.lowrance.com%2Ficr%2FSonar%2FChart+Tutorial.htm&result=0&excerpt=Chart+Tutorial+Deciphering+Sonar+Charts.&question=chart+tutorial&resultType=5000#Goto5

An X96 owners manual can be downloaded from http://www.lowrance.com/en/Downloads/Manuals/