I've been playing this game for nearly 60 hours and I've found 1 white whale (that I wasn't able to kill since I just started the game), 2 social chests and 0 Royal Convoys. I'm at 93% synchronization and have been actively looking for these things since I've started playing. I do have a couple of friends on my friends list that play the game, but still have had piss poor luck. Are there specific spots or places that they commonly appear? I've been putting off finishing the game for some time now because I wanted to complete all the challenges, but this is getting ridiculous.