Talk:Summer 2015 Event/@comment-26919258-20150823081010/@comment-25174240-20150823085656

@Charles lim:

You have to understand the difference between ship-locking and ship-tagging

Ship-tagging. Let's say you do E1 to E5 all on easy. You'll notice that they are still tagged regardless. However, because you're doing easy, they don't "check"  the tags.

Then let's say now you want to do E-6 on medium. Medium and hard has ship locking, so now they "check" the tags.

E6 medium and hard can only use ships with either (1) no tags, or (2) has E3 tags.

E1, E2 and E4 ships  cannot be used for E6 medium/hard because that difficulty will check the tags and reject the ships, you can use them for E7 though. So those ships with E1, E2 and E4 tags are "ship-locked" out of E6