Those of you attended the CMAL /CalMac Meeting 3 Sept 2019 would have seen this video
It shows the modus operandi of the Oban linkspan replacement from leaving Glasgow to its installation in Oban
The same modus operandi will apply next year to the Tiree linkspan replacement .
The heavy lift operation, putting the linkspan in place ,can take place in wind conditions up to Beaufort 5, although sea conditions and other issues will dictate when the the BIG LIFT actually takes place.
It only needs a narrow weather window to put the l/span in place.The ancillary works take most of the time-span.
CMAL have factored in a 10 day contingency margin , based on 10 year historical weather data which explains CMAL’s confidence in the Tiree project not exceeding the current 24 Feb-16 Mar ‘outage period’.
CalMac’s presentation, re the proposed freight-only ferry service freight, did not offer similar confidence.