HDS 3.5 software version and demonstration files

The HDS 3.5 software upgrade is recommended for all HDS displays worldwide. The 3.5 software MUST be installed to HDS to activate the new Lowrance SonicHub™ features.

For a complete list of enhancements, click here to download the HDS 3.5 release notes.

1. Make sure the SD/MMC card reader is properly connected to your computer (and, if necessary, that the drivers are installed).
2. Insert a blank SD/MMC card that is 512MB or larger into the SD/MMC card reader.
3. Transfer the HDS 3.5 software files to your SD/MMC card.
   Choose your operating system:
   

   PC Win98/ME/2000/XP/2003/Vista/7 Click on the link and wait for the installer software to download and run. Follow the Lowrance update installation instructions to transfer the files to your SD/MMC card. When the installer finishes you will be prompted to click Finish to exit.

   Mac OS X (.zip file) Click on the link, unzip the .zip file and copy only the Sims folder, update.conf, and hds-3.5.33.217-1-11494-r7-standard-1.upd file to your SD/MMC card.

4. HDS 3.5 is a 220 MB file and may take a while to download.  Please be patient.

1. Turn your Lowrance HDS unit off.
2. Place the SD/MMC card containing the updated operating software in the unit's SD/MMC card tray.
3. Turn your HDS unit on. The software update will automatically install.
4. After the install is complete, remove the SD/MMC card from the unit, and restart the unit.

1. From a chart or sonar page, press the MENU key twice to activate the Settings menu.
2. Select SYSTEM.
3. Select ABOUT from the SYSTEM menu.
4. The software version is displayed with the title "Application" and 3.5.33.217. 
5. If your Application is the same as listed in step 4 above, there is no need to download the software.

Mac OS X users need to copy only the Sims folder, update.conf, and hds-3.5.33.217-1-11494-r7-standard-1.up file to their SD/MMC card. 

• SonicHub™ Compatibility – HDS 3.5 update provides complete functionality for SonicHub™, the world’s first marine audio server and docking station controlled by a stunning high-definition, waterproof color HDS display.
• System Improvements – HDS 3.5 software improves system stability and increases speed when operating with multi-channel sonar configurations.
• Navionics® Charting Improvements – This new software update enhances a user’s experience with Navionics® mapping products, including smoother route planning, shading of safety depths and contours with both metric and non-metric measures, correcting issues with User Settings not being retained, and correcting issues with HDS reverting to (0,0) position upon power up with no GPS lock.
• LCM Maps – This latest HDS software upgrade several issues associated with displaying older user-created LCM map data.

• Americas - Contact Customer Support
• Europe, Middle East or Africa - Contact Customer Support
• Australia, Asia and Pacific Islands - Contact Customer Support