Here's what I give to my pros when they have to fish out of pre-rigged boats i.e. top 10 on FLW TOUR:
Step 1) Save data from Humminbird unit:
Attach a SD card reader to computer
Insert card in card reader
Save data from Humminbird unit to the MMD/SD card by going to the Main Menu NAV tab and selecting Export All Nav Data.
Step 2) Convert Humminbird waypoint file to GPS Exchange format:
Attach the SD card reader to your PC and place the SD card in the slot
Launch the Humminbird PC software application.
You will see a SD card icon. If you don’t see the card make sure the reader is plugged in and a card is in the reader.
Use the From SD card to PC arrow to transfer the waypoint data from the card.
Once the waypoint data is loaded (displayed) highlight the .gpx file shown in the upper left corner.
Select FILE, SAVE AS and direct it to the SD card (E: drive).
You will now have a .gpx file on the SD card to be used in step 3.
Step 3) Upload Humminbird waypoints to Easy GPS
Open EasyGPS S/W
Select OPEN FOLDER ICON (second from left on tool bar)
Select file saved on Desktop in Step 1
Select SEND Button
“Select a GPS” form will appear
Select “Add GPS” button
Select Lowrance from list on left
Select Unit model from list on right
Connect via file, select OK
Select OK on “Select a GPS” form
Select OK on “Receive from GPS” form
Select OK on “SEND TO GPS” form
Add name of new file to be created to file name line (Lowr_wypts.usr)
Step 4) Upload waypoints to SD card
Transfer Lowr_wypts.usr file to MMD/SD card (You can copy/paste or drag file name to window for Data card reader)
Step 5) Load new waypoints to Lowrance unit
Load MMD/SD card into Lowrance unit
Press Menu, Menu System Setup – Transfer my Data Press Enter button
Select the Load Key.
Highlight your saved file and select Load.