Q: Does NaviPac 4 support C-Map background charts? How can I use C-Map on a Windows10 pc?

A. C-Map is confirmed possible with NP 4.2.3 on Windows10 and 11, using an older dongle type (Jeppesen Client) and accompanying licence. However, this applies for a PURCHASE licence only, the SUBSCRIPTION based licence does not work anymore. It has worked until February 2020.

This applies to HMD classic and not HMD 4.


As we experience problems with C-Map running in other combinations, eg NP 3.10.5 on XP Pro, then we cannot guarantee, that eg NP 3.10.5 with C-Map works on Windows 10.

The Windows 10 default safety settings do not allow the Jeppesen software to install the C-map dongle.

Disable UAC settings and allow firewall settings.
Afterwards install NaviPac with the Jeppesen C-Map Add-ons.

After the installation follow these steps: 

  1. Take a copy of C:\EIVA\Navipac\CMapRTE_EIVAMODIFIED.msi
  2. Go to Windows Control panel and delete the C-map installation
  3. Open a DOS prompt in administrator mode
  4. Choose the library c:\EIVA\NaviPac and copy the backup of CMapRTE_EIVAMODIFIED.msi back
  5. Run now the installer CMapRTE_EIVAMODIFIED.msi  from the DOS prompt. 
  6. After the installation start via the C:\EIVA\NaviPac\CM93\System\LicenseAdm.exe and verfy that the software has found the dongle:




  1. It is now possible to read in the related database




  1. It is now possible to read the related Licence file




  1. And C-map can only be opened by Helmsmans Display Classic.

In short:

Regarding NaviPac 4.x pay attention to the following:

  • C-Map or SevenCs providing (S)ENC charts can only be used in Helmsman Classic
  • Only PURCHASED SevenCs SENC charts can be opened - subscribed charts won’t!
  • There is a high risk that C-Map (S)ENC charts don’t work either due to assumed incompatibility with currently (old) interfaced C-Map framework in NP 4.x Helmsman classic and currently provided licences by C-Map, thus only elderly encrypted licences are supposed to work.

Instead we recommend using SevenCs WMS chart server to display (S)ENC charts in HMD4.

Note, there is also an eLearning chapter: