It is difficult to change people, but by doing something actively yourself you can change the relation or the situation. For example, if you smile or are open about what you think and how you feel you will often find that your actions are contagious. It can inspire to change the atmosphere and make it okay to talk about things that frustrates or are not acceptable.
Is there trouble on the way or do you sense dissatisfaction on board? Help by finding a solution. You do not have to solve it yourself, but you can draw attention to the issues. Ask if you can help your colleague by bringing the issue to whom it concerns. Point out to your manager that there are things being murmured in the corners. Bring up the work environment and well-being during a safety meeting with your colleagues.
Reach out to a colleague or your manager if you do not thrive, are stressed, or have problems at home or with a colleague. It “rubs off” on others, too, if you speak up about the fact that you do not thrive, or if there is something in the work environment that bothers you.
The social life aboard is really important for everyone’s well-being. Has it been a while since you did something fun together, then bring up a couple of ideas for social gathering? Maybe ask your manager if a barbecue, a game night, or a movie night can be arranged. Invite people on board to contribute with initiatives and ideas to do something together. Offer your manager to be in charge of the planning or ask a couple of colleagues to join in.
Remember the value of an informal conversation. Maybe you should take a seat next to that colleague who often sits alone and ask about his or her family, friends, interests. Ask how she or he is doing. Involve other colleagues so that you are not divided into smaller groups all the time. It does not take much to dissolve “us” and “them” groupings.
The management has a great responsibility for the work environment on board, but you can influence it, too. Be brave and point out what you have seen happening on board in a constructive manner. Even small things can make a difference.