Update 1.188 - Airtightness, In-game Help, Relative Dampening

Hello, Engineers! It’s time for another major update! We are happy to share a lot of exciting news and updates about several things we’ve been working on during the past three months. This update is much bigger than we expected and is focusing on better player experience. It’s also addressing a lot of requests we received from you, our great community: Airtightness improvements, relative inertia dampeners, better in-game help and much more!
Coincidentally, it’s also the fifth anniversary of Space Engineers being released in Early Access! A MASSIVE thank you to everyone who has supported us since we launched the game and welcome to all of the new Engineers.

Marek's blog post with detailed info: https://blog.marekrosa.org/2018/10/space-engineers-airtightness_23.html
Full list of features and improvements: https://forum.keenswh.com/threads/7402093