As I said to Lis above, the ship holds 2550 passengers and 987 crew. SO has been on this ship and others quite often because they hold conferences onboard, and he told us how packed they get, especially Deck 13 and the cafeteria. He said that it was almost impossible to find a space to sit, and you had to queue for ages to get onto the ship, and to get food from the buffet. He actually hates going on these cruises for that reason, and he was worried we would have the same experience.
However, on this cruise, there were only 1900 passengers, all of whom were birders

, and our experience couldn't have been more different.

When we arrived at the port, we saw no queues and we were on the ship in no time at all!

There is always a 'Sail-away Party' when leaving port, but it was a very quiet affair, and we realised that the serious birders and guides were already on Deck 7 with all their scopes, binocs, and cameras, looking for birds!!

This is a screenshot from a video of the party, and SO couldn't believe how few people there were, and that was the busiest it was until the last day. On the days in between, this deck was often empty!
We also realised how seriously these birders take their bird watching.

By 9/10 pm most nights, the ship was almost deserted, as everyone went to bed early so they could get up at about 4.00 am to be on deck for sunrise!

We never made it that early, but on the day we arrived at Marion, we were on deck at about 5.30 am.
Even the crew told us how much they were loving the cruise, because there wasn't too much to do as no-one was really using the bars!!

However, this did change after we left Marion, and the birders started relaxing a bit more.
In comparison, Deck 7 was always very busy, and when we were at the islands, if you didn't get a spot at sunrise, you couldn't get near the railings!!
Day 2 at sea.
Day 3, the day before arriving at the islands.
This is why we spent most of our time on Deck 14, where there was always space. The serious birders didn't like it because they said it was too high above the water.
Did I mention that Deck 14 was a smoking deck, which also kept a lot of people away!!