Regarding the Solong / Stena collision, tracking records show that the Solong was travelling along its regular track:
Quoted from:
Sky News’ Data & Forensics unit takes a closer look at the circumstances behind the collision between container ship Solong and oil tanker Stena Immaculate off the coast of Yorkshire.
news.sky.com
The same article shows the Solong travelling on a straight course for a considerable distance before the collision. It would be very difficult to aim at a ship on a swinging anchorage without using course corrections on the approach.
While it's always sensible to be aware of possible sabotage, I think that one at least is definitely cockup not conspiracy.