If anyone is interested, here is the video of the PENELOPE collision (a little more than getting hung up on PRESERVER's anchor. She almost got rolled over):
https://www.youtube.com/watch?v=x2vW7B5JLmY
For those of you unfamiliar with these type of things:
PENELOPE is the ship that is on the right side of PRE at the start. She and PRE are steamships, so the black smoke you see coming from their smokestacks at different times indicates that the engine rooms have just got and are executing "full speed" orders.
PENELOPE goes full speed first. But in her case, it was because, as she made her approach to refuel, the engine telegraph on the Starboard engine got stuck at "full ahead". The engine room obliges, but before that can be noticed, the counter order be passed and new way of communicating engine orders established*, it is too late: she has lurched ahead and been pushed to port. At that point, it is too late and her best chance is to put speed on again to cross in front of the AOR as fast as possible.
On the left side, you can see a textbook emergency breakaway, where the gear is quickly returned to PRE while the refuelled ship eases herself quickly out to open the distance, and executes a hard turn to port as soon as the last connection is broken.
At that point, PRE is free to maneuver and full speed astern is ordered (hence the black smoke) and turn hard to port to minimize the blow.
PENELOPE was lucky enough to have had this happen to her while fueling from a Canadian AOR. The British and American supply ships of that era (and today's too, including all the new ones Canada is about to get - Berlins and Asterix) had bulbous bows to help with speed and fuel consumption. PRE did not, and otherwise, PENELOPE would have been sunk.
*: For educational purposes here: for frigates of that era, like the LEANDERs and ST-LAURENT's, there are no engine controls or status indicators on the bridge of the ship. All engines are controlled manually by the engine room. Orders go from the bridge to the wheelhouse (located below decks in the centre of the ship - again not on the bridge) by microphone (or voice pipe when no power available), where they are then transmitted to the ER by way of mechanical telegraphs (one at each end - connected by chains and wires traveling in tubes. The Engine rooms themselves have a second set of telegraphs to order the then required steam settings from the boiler room. when the engine room "repeated" an order received from the wheelhouse, it meant "got what you want, I am getting on with doing it now", not "order has been executed". So it could take quite a few precious seconds before anyone realizes that an engine order is not being executed or is being executed improperly.