Airship Guide

[Eldeniel]

Hello Guys, need a little help there.

Our aircraft is rank 27 but we have not unlocked sector 7 and of course not sector 8 either. But i saw that many of you have already unlock sector 7 and 8 before the rank 30.
Something strange for us is that the game says the we cannot reach sector 7 before reaching rank 30, but it don't seems to be the case for all of you. Someone can explain me a bit ? I can also add some comments about what we have and such.

Thank you in advance for the help

EDIT :

Hey thx for the answer.

Can't post a screenshot right now cause the aircraft is on a trip. but i will tomorrow. So far we have unlocked sectors 1 to 6 and sector 11 but we can't access him cause we have not reached rank 30 yet. As for the parts i will post a screenshot tomorrow too but for now we have 2 enterprise pieces and 2 invincible pieces, will post a screen tomorrow too.

For now we have :

Hull : Enterprise
Rigging : Invincible
Forecastle : Enterprise
Aftcastle : Invincible

For the current trip we have selected the sector 6 first, the sector 5 in second and the sector 4 at last. Hope we will discover the sector 7 when it comes back :/