I have just posted photos of our new security system for the companionway. As you can see the feature can be used both when leaving the boat as a extra strength to locking the companionway and when inside the boat if you want air and wish to leave the companionway open but feel you are staying in perhaps a potentially unsafe anchorage.
Arcglow in Almerimar (Spain) can be contacted by email, arcglow@..., if anyone is interested.

Keith
on Guma