Black Sails is a pirate action RPG based on the Assassin's Creed 4: Black Flag spin-off, featuring unparalleled new naval combat gameplay from the studio behind the Assassin's Creed series. Experience exciting, brutal and tense naval battles on your way to domination of the Indian Ocean. Sail faster, shoot farther, hit harder, dodge deadly attacks, and make yourself invincible with an innovative Sea Breeze system. Track your enemies and use the peep scope to find weak spots. Gather your gang to crush large merchant fleets or outwit powerful enemy fleets. Execute the way you want to fight with a large number of tactical options. 
Blue Sea Black Sail is now in open beta, in order to avoid the problem of flashback, packet loss, error and black screen during the game, I have summarized several effective methods for you, I hope it can help you. 
Solution 1: Optimize the network.
A stable network environment is a must when we play games, and Bihai Black Sail uses a foreign server, we can't avoid network fluctuations if we connect directly in China, we need to open [Xun Yiyou] to optimize the network of the Bihai Black Sail game server to ensure a stable network environment, and then enter the game.
Solution 2: Disable the firewall.
Our computer's firewall will block the normal connection of the game server, we can temporarily turn off the firewall on the computer before playing the game to ensure the server connection. 
Solution 3: Restart the router.
Our router will have a lot of network nodes and network caches running for a long time, which will cause our network to become stuck, and playing games is flashback, packet loss, error, and black screen, we only need to restart our router, and then re-enter the game. 
The above is all the content of "3 solutions to the blue sea and black sail flashback, packet loss, error and black screen", I hope it can help you.