求助

supervisorsq

Service Notations	ABS (as oil tanker): + A1 Oil Carrier, +AMS, +ACCU; Navigation: Unrestricted BV  (as dry cargo ship): C X general cargo ship
Navigation notations	Unrestricted
Additional class notations	X AUT-UMS X GRABLOADING (refer to para. D.2 below)

请问   以上一些：AMS     ACCU       GRABLOADING  AUT-UMS 是什么意思？
最后一个是无人机舱吗？