@Chesty Morgan
No - a contactable is a period where the company can call you, to advise of a duty starting no earlier than 10 hours from the start of the contactable period. It is not another word for a stby. I could quite reasonably have planned to be out of the country on a contactable. A rostered contactable should not change to a stby or a flight 2 days prior.
You've obviously had a great roster this summer then. Thus highlighting the inconsistencies. May - July, the vast majority of weeks for me was 5-6 days, with 2 or 3 day off in-between, hitting 100 hrs in 28 days.
I don't answer my phone on a day off, nor reply to the text messages - but it's still an interruption on a day off....
Cheers,