• A vessel must start from and return to the same point, must cross all meridians of longitude and must cross the Equator. It may cross some but not all meridians more than once (i.e. two roundings of Antarctica do not count). The shortest orthodromic track of the vessel must be at least 21,600 nautical miles in length calculated based on a ‘perfect sphere’. In calculating this distance, it is to be assumed that the vessel will sail around Antarctica in latitude 63 degrees south.
• A vessel starting from any point where the direct orthodromic distance is too short shall pass one single island or other fixed point on a required side so as to lengthen his orthodromic track to the minimum distance.
• No starting point will be permitted more south than 45 ° south.
• 1 degree of longitude at 63 degrees south will be taken as 27.24NM
Henrik intends to leave the European continent on a favorable weather window at the beginning of November.
The attempt is an approximate distance of 27,000 nautical miles.
To beat the current record, Henrik will need to average 195 miles per day, or roughly 8.2 knots/hour.