100 meters either side ... it's the standard exclusion zone ... and if you think that yacht is in it you need (as the ad goes) to go to specsavers! ...
Well i picked new glasses up yesterday ... from Specsavers! (seriously! )
The notice to mariners below.
Not sure where is it when the pic taken, but it seems 300m either side and 1km in front and behind.
Picture number 4 the boat is right in front of it!
Pic number 8 - 300 mtrs - doubt it!
The Temporary Exclusion Zone of 300 metres around the vessel, established by The
Queen’s Harbour Master, Portsmouth in General Direction No 1/15, remains in force
until the vessel leaves the Dockyard Port of Portsmouth. Thereafter, for the passage, a
Temporary Exclusion Zone has been established by the Secretary of State’s
Representative (SOSREP) (as attached) and, exceptionally, a Moving Prohibited Zone
of 1000 metres ahead and astern and 100 metres on either side and ‘Clear Channel’
status will apply to the vessel throughout the passage.