A lot of ports need investment at this stage! Fishguard can accommodate vessels with a maximum draft of 7.00m and LOA of 180.00m. Keep in mind Koningin Beatrix wasn't small, and managed to fit (her LOA was 165m). Personally, feel Fishguard went backwards when it lost the direct train to London.
I preferred docking in Swansea when it used have it's direct ferry link with Cork so; you were on the motorway towards London faster than if you had got off at either Fishguard or Pembroke Dock. Swansea is worse! The ferry berth in Swansea is tidal and can not take a ship of more than 150m (B&I had problems in the 70s finding ships that could fit). It's inadequate as a modern ferry port.
As far as I know, on the Wesh side, Hollyhead is the only port that can take any ship (Pembrooke has a limit too).
Yeah, I've heard about the tidal constraints which made Swansea quite difficult to use in terms of shipping timetables if tidal conditions were not favourable which could become a nightmare if a ship's schedule was forced to change due to challenging weather conditions at times.
That said, I think the reason Cork had opted for Swansea was probably to provide an alternative choice to passengers as both Fishguard and Pembroke were already being served by regular services ex-Rosslare by Stena Line and Irish Ferries.
Cork did have direct ferry link to Fishguard until the late 1960's but this was all stopped when British Rail, which I gather controlled the port of Fishguard, brought an end to the Cork link so; Swansea was then used instead.
At a later stage, the Cork Swansea link became a Cork to Pembroke Dock service towards the end of B+I Line's days using Cork until the end of 1983 Summer season as far as I know although; Cork Swansea Car Ferries Ltd and later Fastnet Line operated between Cork and Swansea once again during their respective periods in operation.
Perhaps if Rosslare was only serving the one South Wales port at Fishguard, Cork might have revived services to Pembroke Dock once again. If airline flights become a lot more expensive in the years ahead perhaps it might make ferry services more relevant and affordable for passengers & tourists and I'm pretty sure that Cork/Kerry Tourism could badly do with more transport links located closer to Ireland's South-West region.
Things will change in the years ahead I suspect for some of the following reasons:
* Fallout following the Coronavirus/Covid-19 pandemic
* Cost of using fuels after collapse in oil prices on global markets with the world in lock-down for so long along with an expected global recession/great depression.
* BREXIT is still unfinished in terms of the trade negotiations between UK and European Union
* Climate Change/Lowering CO2 emissions debate is not going awayReferences:
Innisfallen Narratives | Cllr. Kieran McCarthyhttp://kieranmccarthy.ie/?p=2192https://roaringwaterjournal.com/tag/swansea-cork-ferry/