Hi Gadget
A while ago, I downloaded the death certificate you mention - but I doubt it is the correct one as although it gives the correct name, Christina Mackenzie and the correct name of her spouse, Duncan Mackenzie, deceased seaman the rest of the details are wrong.
It says the father was Ronald Mackenzie, deceased - when I know her father was Kenneth Mackenzie, and it says the mother was Helen Mackenzie, m.s. McDonald, deceased when I know that her mother was Catherine Mackenzie.
Another thing which makes me convinced that this is the wrong death certificate is that the death was registered by Margaret Mackenzie, aquaintance of 17 Steven Street, Glasgow. It also states that this Christina Mackenzie's usual residence was 17 Steven Street, Glasgow but she died at 133 Balornock Road, Glasgow.
My grandmother, Christina's daughter who was Mary Ann Fraser would have been living in Glasgow in 1944 as well as my mother, and surely they would have registered the death themselves.
It's all a bit of a mystery!!!