How can this be explained?

Mark L

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Yes, plus their other ferries are following the normal route.


Very odd. Is it a coincidence that the new track seems to make each crossing almost exactly 100NM? Anything significant about that from a regulatory point of view? I've no idea!
 

Mark L

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Very odd. Is it a coincidence that the new track seems to make each crossing almost exactly 100NM? Anything significant about that from a regulatory point of view? I've no idea!


Actually, another feature of the track seems to be that it does not go more than 20 miles from land (Ireland, IoM, GB). Looking online at the Irish merchant shipping regulations suggests that elements of the construction regulations can be waived for class II passenger ships if they stay within 20M of land.

"The Minister may exempt any ship of Class II or II(A) which does not proceed more than 20 miles from the nearest land from the requirements of these Rules to the extent that he is satisfied that compliance therewith is unreasonable or impracticable by reason of the sheltered nature and conditions of the intended services of the ship. "

S.I. No. 98/1967 - Merchant Shipping (Passenger Ship Construction) Rules, 1967.

Possibly an issue was found with the construction/ condition of the ship and a special exemption was applied for?
 
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Slowboat35

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Actually, another feature of the track seems to be that it does not go more than 20 miles from land (Ireland, IoM, GB). Looking online at the Irish merchant shipping regulations suggests that elements of the construction regulations can be waived for class II passenger ships if they stay within 20M of land.

"The Minister may exempt any ship of Class II or II(A) which does not proceed more than 20 miles from the nearest land from the requirements of these Rules to the extent that he is satisfied that compliance therewith is unreasonable or impracticable by reason of the sheltered nature and conditions of the intended services of the ship. "

S.I. No. 98/1967 - Merchant Shipping (Passenger Ship Construction) Rules, 1967.

Possibly an issue was found with the construction/ condition of the ship and a special exemption was applied for?
Well now, there's the first rational explanation.
There'll be a defect on the vessel or its equipmenr that prevents it from going more than 20 miles offshore.

What other requirment could explain such a carefully selected route?
 
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