id	description	section	req	max_loop	max_usage	pos
V1	Vessel Identification	H	M	0	1	1
K1	Remarks	H	O	0	2	2
R4	Port Or Terminal	H	M	999	1	3
DTM	Date/Time Reference	H	O	0	15	4
V9	Event Detail	H	M	0	5	5