A. how to use:

1. install
2. copy .lic to C:\ProgramData\AtoBviaC\PortToPort	把PortToPort.lic复制到安装文件夹即可，其他不用管
3. Can be used with RunAsDate, with date 01-06-2019
4. AND ignore any errors about licence*


PortToPort Desktop provides similar functionality to PortToPort Online.

The significant differences are as follows:
- PortToPort Desktop can be installed on a Win PC and provides offline access to the AtoBviaC Marine Distance Tables.
- Annual subscriptions are based on individual computer licences rather than a number of distance calculations.

The AtoBviaC Marine Distance Tables have a long history of being the definitive distance provider to the shipping industry.They continue to be the standard for marine distance calculations.

All distances are based on a contemporary network of routes maintained on a weekly basis by AtoBviaC using Admiralty Notices to Mariners. Tables updated to Admiralty Notices to Mariners 2021 Week 46.