These plans should work:
BoatsClemenceauIroise.txt:
AC#1,B7640,10%,8Hr,00:00:58,02:00:38,39,normal,ferry,03:27:29,05:27:08,39,reverse,ferry
AC#2,B7641,10%,8Hr,00:03:07,01:59:12,40,normal,ferry,03:30:17,05:26:22,40,reverse,ferry
AC#3,B7642,10%,8Hr,00:00:23,02:00:03,39,normal,ferry,03:26:43,05:26:22,39,reverse,ferry
PlansClemenceauLorient.txt:
AC#1,B7640,10%,8Hr,00:00:58,02:00:48,39,normal,ferry,03:27:19,05:27:09,39,reverse,ferry
AC#2,B7641,10%,8Hr,00:02:58,01:59:56,40,normal,ferry,03:30:28,05:27:26,40,reverse,ferry
AC#3,B7642,10%,8Hr,00:00:04,01:59:54,39,normal,ferry,03:27:14,05:27:04,39,reverse,ferry