Definition
Term used in a wide sense to include any area of SEA ICE, other than FAST ICE, no matter what form it takes or how it is disposed. Pack ice may be described as VERY OPEN PACK ICE (1/10ths-3/10ths), OPEN PACK ICE (4/10ths-6/10ths), CLOSE PACK ICE (7/10ths-9/10ths), VERY CLOSE PACK ICE (almost 10/10th with little if any water visible).