This is the reply we received from Martin's Taxi:
GOOD DAY
NO NEED TO MAKE A BOOKING
YOU WILL HAVE TO TAKE THE FREE SHUTTLE BUS FROM THE SHIP TO THE CRUISE TERMINAL WHERE TAXIS ARE WAITING IN LINE
ROUND TRIP WILL COST ABOUT 110 € PER CAR FOR 8 PASSENGERS
IT IS NOT A FIXED PRICE
DRIVERS DRIVE ON THE METER
IF YOU WOULD HAVE A PROBLEM ON THE DAY YOU CAN ALWAYS CALL ME
THANK YOU AND BEST REGARDS
LOU
MARTINS TAXI BVBA
POLDERWEG 16
8380 ZEEBRUGGE
MOBILE PHONE 0032 477 66 77 88