四航奋进: This ship's name is translated as "Four Aircraft Endeavour", but is it?
This is a typical example of Chinese English. 「四航」is the company or institution who built the ship. It has nothing to do with the ship's structure. I read 「四」 in 「四航」 as fourth. There might or might not be 「一航」 or 「二航」. Here's the official website for 「四航」.  「四航」 is short for 「第四航务工程局」， it's a company mainly engaged in construction of a variety of infrastructures like ports, bridges, hydraulic works and etc. according to the about page. They call themselves Fourth Harbour Engineering in English.

"Four Aircraft Endeavour" is a confusing translation. Literally, 「四航」 is "Fourth Harbour" and「奋进」 is Endeavour in this context, although I'm not sure whether Endeavour is a good translation. I would probably translate 「奋进」 as striving forward but it doesn't sound like a name.