from slice:

If you bid 'new equipment in a base' (eg 330 MIA? 777 PHL?, 737 PHX/CLT??) you incur a 12 month base lockin even if you don't trigger training.

'New equipment in a base' allows you to break any existing lockin IF your current lockin existed before the 'new equipment' was announced.

Eg, bid 767 in May 2016. Company announces 737 CLT for FEB 2017 this month. You can break the 767 lockin but you'll incur a 24 month equipment lockin and a 12 month base lockin. I'm not sure if you could then MBE out of CLT. In Jan 2017 the company announces 330 MIA for May. You can break the 737 lockin under the 'new equipment in a base' and transfer to the 330 in MIA.
And in Sept 2017 they announce 777 in PHL. Off you go again. And in Dec 2017 they announce 787 in JFK. You can bid that also.