看看这句话里面的LAT是什么意思

chgdong213 · 发表于 2010-8-11 12:12

All risers and associated clamps and guides
above elevation (+) 4.8 m [(+) 15'-0"]
referenced to LAT (or above the first riser
flange if the monel has been taken up to this
section).

scmwta · 发表于 2010-8-14 21:55

lowest astronomical tide 最低天文潮

[设计制造] 看看这句话里面的LAT是什么意思