ASM Online Services – Planned Downtime
Historic - 20:00, 28th May - 21:00, 28th May
In order to carry out essential system maintenance, ASM Online Services will be unavailable on Wednesday 28th May 2025 between 8pm and 9pm. During this time you will be unable to send and receive messages in Sequoia. You can prepare your CDS declarations ready to send once the outage is complete, but will not be able to view or prepare Safety & Security declarations or Transit phase 5 movements so please retrieve any Transit documents you need prior to the outage. To improve re-connection behaviour following this outage, please ensure that you are running version v5.16 (or higher) of Sequoia. We apologise for any inconvenience this may cause.








