When an ENC (cell) that you hold is 'cancelled' by the ENC producer and replaced by a new ENC (cell), your AVCS licence will be automatically updated to include the new ENC (cell) and you will be sent a new set of Chart Permits.
An ENC can be 'withdrawn' from AVCS for safety reasons. In that case, the permit remains in permit file, and there is no automatic replacement. You should manually remove the ENC from your ECDIS until you are informed that it is safe to re-install.
On rare occasions, an ENC Producer instructs UKHO to 'withdraw an ENC from sale' for commercial reasons, not safety. They do not issue cancellation updates and they continue to support it with product updates until all licences have expired. In this situation, existing users can continue to user the old ENCs until they expire but they are no longer available to purchase. While we recognise that this may be confusing, we are required to follow the producer's instructions for coverage in their waters.
If you have not received new Chart Permits or you are unsure if ENCs have been cancelled or replaced then contact your ADMIRALTY Distributor for advice.
