We were in E308 - another "partially obstructed view" stateroom on the Diamond Princess. The left side of the window was obstructed by about 10% by the lifeboat davit. That deck has the lifeboats outside the windows, so you may get to see something, you may not. If you go to the www.princess.com
, you can look at a "floor plan" that's very accurate and it should show you where the lifeboat is in relation to your window.