I hope to clear up a few things in the comments above, even though there are many lines of discussion here.
I sailed as Master on POBII for 9 years and the author of Tall Ship’s Down was also my mate back in the 1990s.
POBII and POB both have “Running Main Stays” that are “tacked” every time the vessel tacks from Port to Starb’d. The “Lazy” runner is pulled back to the Main Shrouds on the leeward side, and lashed in place with a gun tackle to those shrouds.
The line in the above picture that is described as the Main Runner is in actuality a Fore Gaff Preventer when the vessel is running off the wind. This Preventer is run forward and made off and settles the gaff down in a rolling sea while off the wind. The Preventer is in the “lazy” position in the picture.
Portofdc posted a description, actually part of a press release, of the POBII dismasting off the coast of Spain. The actual cause of the dismasting was ironwork that broke on a bobstay deadeye, leading to the chain of events. I received the second phone call from the Master after they got dockside in order to discuss a plan for restoration and mutual support after having sailed the vessel for some period in the same waters.
I trust this clears a few things up.