Challenger has been fully certified by the UK Maritime & Coastguard Agency (MCA) for providing electronic Notices to Mariners as a replacement for paper versions. It has also been approved by the United Kingdom Hydrographic Office (UKHO) to provide their navigational data in a digital format.
The full list of approvals are as follows:
United Kingdom Hydrographic Office
Maritime & Coastguard Agency
Republic of the Marshall Islands
Isle of Man Ship Registry
Malta (Transport Malta)