Hi Geir,
The list contains ships exceeding 200,000 cubic feet refrigerated space. Ships of less than this are generally not reefers but freezers (fish carriers) & unable to carry fruit products whereas reefers can carry anything between -20 & +15C. Known reefers of less than 200,000 cuft are included in the list.
ISLEMAN (YURUSHIMA MARU) is a freezer of 197,056 cuft & is designed for transhipping at sea; note the Yokohama fender on deck.
I do have records of nearly all ships less than 200,000 cuft down to 50,000 cuft & can generally answer any questions about them should you require.
Regards,
Tony