A floating vessel modular protection and security device includes a stationary bowed frame configured to be positioned over a floating vessel, the stationary frame and a moveable bowed frame. A stationary flexible cover extends from one end to the other end of the stationary bowed frame, covering stationary crossbeams. The stationary flexible cover having a length from end to end that is shorter than a length of the floating vessel. A moveable flexible cover extends from one end to the other end of the moveable bowed frame, covering the movable bowed frame crossbeams. The movable bowed frames slides on the upper moveable frame track and lower stationary frame track simultaneously to repeatedly retract and deploy to access or secure a floating vessel.