Reading some of the recent bug reports and thought it may be a good idea to explain how the treasure wrecks work.
Almost everything about treasure wrecks is random:
Where they spawn is not based off a set position, just a set depth, so where it spawns is random every time and you will almost never have the wreck spawn in the same location twice
The zone that marks the wrecks location spawns at a random position around the wreck so you could never say "it always spawns in the bottom left quarter" or anything like that
When they spawn is not specifically predefined, they spawn at a random time between a min and max value (eg: between 10 and 30 mins)
How long they stay spawned for is also random between a min and max value
The time between a wreck despawning and another spawning is random between a min and max value
The object they spawn as is either an osprey or trawler (you can tell which one it is by the marker in the zone)
The items that spawn in the wreck and the amount of each item is random from a list of whitelisted items and amounts
Valuable items
Not so valuable items
Because of the amount of whitelisted items right now you would be unlucky not to find valuable items
To search the wreck you scroll on it
If you keep finding nothing, try emptying your inventory or getting a bag and/or vest so you have more room
With all that being said I have addressed issues pointed out in recent bug reports for the next update. Just keep in mind these wrecks are not supposed to be easy to find.