mean high water springs(平均大潮高潮位,
MHWS)
mean high water neaps(平均小潮高潮位,
MHWN)
mean higher high water(平均較高高潮位,
MHHW)
mean lower low water springs(平均朔望低潮位,
MLLWS)
mean low water springs(平均大潮低潮位,
MLWS)
mean low water neaps(平均小潮低潮位,
MLWN)
past
highest high water level(過去最高潮位)past
lowest low water level(過去最低潮位)