Anyone have ocean/offshore experience with swing keels?

[Spider0804]

I am curious about swing keels like the southerly line.

In an ocean scenario a large worry of mine would be getting knocked down and having the keel slam back into the trunk.

I have searched for information on this but the only thing I have found is heresy and nothing that resembles any real experience.

Out of curiosity I looked at the setup for a southerly swing keel to look for a down lock pin but I did not see such a thing, or if there was one installed, how it would be put in and out with the trunk being a solid glass case except for the few holes for inspections or parts to go through.

Any swing keel owners out there have experience with ocean transits or rough conditions, maybe experienced a knockdown?