Who or were are  the four hours saved .

It takes WB Yeats 4 hours to come level with Rosslare. OK it takes 1.5 hours Dublin to Rosslare by car, but some holidaymakers reckon that this is part of their holiday; far better than the industrial landscape at Dublin Port.

Not really a big selling point i would think , not everyone as such are from  from Dublin . Passengers from the west and north are better served from Dublin . As for the industrial landscape , it makes no difference whether you're at a ferry terminal In Dublin or Rosslare they all look the same . In fact  Dublin would be more of more interest with the larger variety of vessels in port .

It takes WB Yeats 4 hours to come level with Rosslare. OK it takes 1.5 hours Dublin to Rosslare by car, but some holidaymakers reckon that this is part of their holiday; far better than the industrial landscape at Dublin Port.

It's actually three hours more to Cherbourg from Dublin not four , The ship sails across at an angle down the Irish Sea . If it were to sail from Dublin to Rosslare Port it would be  four hours , but it doesn't . Plus the drive time from Dublin to Rosslare is just over two hours not an hour and a half and more like  nearly three hours in reality . So no time saved by going from Rosslare  for those travelling from north of Rosslare .

On WB Yeats as I write and after 4 hours we are just level with Rosslare @ 2000 hrs

According to Marine Traffic, WBY departed Dublin at 16.38, so that's 3 hours 22 minutes.

According to Marine Traffic, WBY departed Dublin at 16.38, so that's 3 hours 22 minutes.

Marine traffic reports on when the ship has left the port not the berth, so there is extra time to be added to Marine Traffic time. I know one of the Captains of the WBY and he said the trip from Dublin is four hours longer than Rosslare.

Using published schedules ,WB Yeats Dublin to Cherbourg 18 hours duration  ,Stena Rosslare to Cherbourg   17 hours duration . That's only one hour difference between the two departure points , Epsilon Dublin to Cherbourg is 19 hours duration making it a two hour difference .  So this four hours sailing time down the Irish Sea from Dublin to a point somewhere off the coast inline with Rosslare makes little difference over the total sailing  time to Cherbourg .

Is the 1 hour difference between WBY and Stena Horizon because  WBY is a faster ship?

Is the 1 hour difference between WBY and Stena Horizon because  WBY is a faster ship?

Pretty much.

I think the difference in sailing times for WBY from Dublin to Cherbourg is only an hour or so compared to what Oscar used to do as well?

Is the 1 hour difference between WBY and Stena Horizon because  WBY is a faster ship?

Speed and  distance , Dublin is only 67 nautical miles further from Cherbourg ,

WBY has more power than epsilon and comfortably makes the voyage. 

WBY has more power than epsilon and comfortably makes the voyage.

At what price in higher fuel costs?

WBY has more power than epsilon and comfortably makes the voyage. 

More power maybe but also much bigger , interestingly Epsilon is faster at 24 knots to WB Yeats 23 knots , so size doesn't always matter .

Cost per combined passenger and freight unit will be lower when she is full.