So Basically What You Should Do Is, It Would Attach But It Would Be Able To Move A Few Meters Slightly, So It's Basically Not Fixed To The Walls Of The Level

If There Were To Be Anchors And Grapples On Every Submarine, It Would Ruin The Crashing Element Of The Game Since It's Just Been Prevented. Also, I Don't Understand Why You Need A Nearby Platform For You To Explore Alien Ruins, Just Use Maintain Position On The Navigation Terminal And There You Go, ...

Steel Hulls That Are Stronger And Easier To Repair Than Normal Hulls But Are Brittle In Colder Temperatures.