Deliberated on how it had capsized (6,4)
I believe the answer is:
turned over
This might be a double definition.
'deliberated' is the first definition.
('turn over' can be a synonym of 'deliberate')
'capsized' is the second definition.
('turn over' can be a synonym of 'capsize')
'on how it had' acts as a link.
This may not be right. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for turned over that I've seen before include "Having considered carefully" , "reversed position" .)