Camera - Emulate sea movement

I have a spaceship in space. Camera is in 3rd person view. I’m thinking of making the camera give a motion effect like if the camera is attached to a boat at sea. Slowly rocking in random directions. I’m not asking for code so much as suggestions on how to do this. I don’t want to make the ship move, just the camera.

How about using Math.Sin() or Math.PingPong()? I do a separate calculation with different frequencies for x, y, and z, and see how it looks.

Upvoted above, I would also suggest PingPong, or you could get more variance in your ‘waves’ by using an Animation curve.

Ping Pong : Unity - Scripting API: Mathf.PingPong

Animation Curve : Unity - Scripting API: AnimationCurve