What This Means
The key sailing is Explorer of the Seas on a 7 Night Greek Isles Cruise from Rome (Civitavecchia), listed at 1200 points. The top metric at this tier is a Balcony - GTY option on Ovation of the Seas for Alaska, but the Europe unlock is the meaningful shift: it puts a real Mediterranean itinerary into the working range.
The 1200 tier also matters because it is the first balcony breakpoint this month. That makes Europe more than a destination checkbox. You are not forced to stay in interior-only inventory to reach it. The tier mix includes Balcony - GTY, Oceanview - GTY, and Interior - GTY, so the cabin ladder is broad enough to shop.
If you want Europe with more room to choose, 6500 is stronger. But if the question is when Europe becomes practical at all, the answer is 1200.