Parametric/Synchronous rolling, broaching, surfing

[MJJ]

Hi

Can anybody please remind me about the above types of vessel movement (and any other unexpected "funky" movements that a ship can make). What they are, what causes them, how to get out of them.

This was never explained very well at college

Thanks

[Pilot Chris]

To start backwards to get out of them course / speed changes as per the below guides

(edit - watch video before reading circular, forgot how good that video was!)

IMO circular 1228 has a bit about it:
http://imo.udhb.gov.tr/dosyam/EKLER/1228.pdf

I think this video was shown to me in the past and pretty good:
https://m.youtube.com/watch?v=p1m13bJKsDM

[YoungMariner]

To start backwards to get out of them course / speed changes as per the below guides

(edit - watch video before reading circular, forgot how good that video was!)

IMO circular 1228 has a bit about it:
http://imo.udhb.gov.tr/dosyam/EKLER/1228.pdf

I think this video was shown to me in the past and pretty good:
https://m.youtube.com/watch?v=p1m13bJKsDM

That video looks like a typical high swell entry into our port Chris...

[Pilot Chris]

Ha yeah I was thinking of your place and also the NZ boys!