huh? er, what? Somebody mentioned my name? (G)
Foredeck stanchions are held in place by a bit of hollow tube, and the stanchion fits down into the tube and is held by a cross-pin or bolt. These often have a wobbly fit, too.
Where it gets tricky is the netting rigged in the bottom two lines.
Striking down is middling easy.
Slack the netting, and bind it up with marline.
Pull the pins from the section to be struck down. Pull the stanchions and slide them down to the end of the where the gap is to be. Marline all the stanchions to the last standing one.
Slack the lifelines (and netting if needed) and police it up.
The smart Sea & Anchor Detail will have fitted stanchions to the sockets along the midships line, and fitted a lifeline there.
All of this can be dependent upon the sea state, weather conditions, how emergent the situation is, and so on.
Now, those lifelines will be a white to pale gray color from being out in the weather, if a person were inclined to paint them differently.. or, just paint them in the vertical side color and call it even.