I think that the suggestion above about having the titanic survive and another ship sink would be a good plan. something different than the same old story in a slightly different guise.
If people want the role of ships officers and dog (surely djm, you mean 'cat'). i know a few people who could take the part of coal in the ships bunker 
Joking aside, I've tried to write books before (under siege, but on a car ferry) and I know how difficult it can be. So, best of luck! It is rewarding when you finish one.
Stu
That is definitely a nice thought about my idea

, thank you Stuart2007

. Yes, the Antonia Graza will sail straight into an iceberg with the fore first

, she will have, like her sister the Andrea Doria 11 hours to stay afloat and MANY ships will come to rescue

: Titanic, Olympic and Brtiannic as well

, the 3 Royal Mail Steamships sisters will all come to assistance.