Sea transport: 100% Blue (little risk of material disruption)
Shipping companies had been behind on millennium bug plans in July, but in October the industry was assessed Blue under Action 2000 guidelines.
Operators of all British-registered ships were assessed by an independent body, under the responsibility of the Maritime and Coastguard Agency (MCA) and the Department of the Environment, Transport and the Regions.
A selection of foreign ships operating in UK waters have also been tested.
From November, ships which cannot prove they have a Y2K contiongency plan will have to demonstrate how they will navigate and manage cargo in the event of computer failure.
And vessels which are considered a risk to safety or the environment will not be allowed to sail over the New Year.
Independent assessors have also looked at the 15 largest and a further 12 key ports. According to the Department for the Environment, Transport and the Regions, which is responsible for sea transport in England, the ports sector has been assessed 100% Blue.
The Action 2000 traffic light codes:
Blue: The assessment has not identified any risks of material disruption to the infrastructure process.
Amber: The assessment indicates that there is some risk of material disruption to infrastructure processes, but that there is an agreed containment plan to rectify shortcomings.
Red: The assessment indicates that there is a severe risk of material disruption to infrastructure processes and that timely rectification might not be possible.