Pipeline
From M2K2: Metroid Prime 2 Wiki
Discovered By: EVERYBODY
You can use Gravity Boost Under Water
Discovered by: Player's Guide
You can Boost down the ramps leading to the water.
Discovered by: Forcemaster (Roy on the forums)
If you come from the dry part of pipeline,go down the ramps into the water at your favourite way (i love boosting there), then you are in the underwater art, there are the ledges where you stand on when you come out of the "tubes" right? Well, morph, boost of one of the ledges into the deep part, then inmediatly hit X to unmorph, while you unmorph hold b,and samus should start using her gravity boost to float up withouth her cannon sticking out for a few seconds,i can make it much faster to the other side of the area by using that :)