The Orange Challenge team is now 12 hours ahead of the record for the fastest sailing around Britain and Ireland.
The boat is travelling at just over 21 knots as it rounds the northern tip of the Shetland Islands.
Orange is well on target to beat Steve Fossett's October 1994 record of 5 days, 21 hours, 5 minutes and 27 seconds.
Orange is experiencing south-easterly winds of about 30 knots, but once the boat hits the North Sea light head winds could slow it down.
Story filed: 09:49 Thursday 15th August 2002