Motion compensating ship personnel transfer gangway - GIF

**Jon** · May 22, 2018, 09:58 AM

If two of our recent GIFs (Motion compensating ship crane and Boarding a moving cargo vessel) had a child, it would be this GIF: Motion compensating ship personnel transfer gangway.

It's interesting how this is still a one-person-at-a-time transfer.

Previously:

Boarding a moving cargo vessel - GIF
Motion compensating crane for moving cargo containers at sea - GIF

**rgsparber** · May 22, 2018, 05:50 PM

It is always cool to see what a simple feedback system can do given enough power. I wonder how the smaller ship senses the position of the big ship before the gangway is deployed. Maybe there are 3 targets on the big ship and distance sensors on the small ship.

**ranald** · May 22, 2018, 06:34 PM

Needs more than the 3 police cameras & computer we have today in a patrol vehicle I suspect. Dare I say it............................Y not....................................I'd be all at sea there. :-).

**12bolts** · May 22, 2018, 09:13 PM

The larger vessel looks to be an FPSO The supply ship providing the crew most likely has azimuth thrusters to hold position. Connected to a DGPS system they can maintain incredible position accuracyon the high seas. About the only thing the gangway needs to do is compensate for rise and fall due to wave action.

**Jon** · May 22, 2018, 09:47 PM

3:16 source video:

**Captn Roy** · Aug 14, 2018, 10:57 PM

Originally Posted by Jon

3:16 source video:

Hi Jon, These systems are amazing, the evolution of these platforms has gone leaps and bounds in usefulness & the safety factors are excellent. I read a paper on the programming required on one of the older platforms, Back in the early days of the design. They've come a long way and are safe to boot. The folks going across in the video are not falling over or losing their footing anywhere. They look totally relaxed. Thanks for sharing this Jon.
RR