VDR AMI VR-2272B
1. VDR Mother board
2. Fixed Capsule VDR
VDR Mother board LT10000
PDC
AMI VR2272B SVDR
VDR
S-VDR
X-VDR
S-VDR
VR2272-B

VDR = voyage data recorder
S-VDR = simplified voyage data recorder
VR2272-B s-VDR
S-VDR just has to record less information than the full VDR
S-VDR can use a float-away EPIRB memory capsule as an option to fixed one.