The ornamental design for a marine surgeprotector, as shown and described.
FIG. 1 is a front perspective view of a marine surge protector according to our new and ornamental design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is right side view thereof;
FIG. 6 is top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines shown in the drawings are for the purpose of illustrating portions of the marine surge protector that form no part of the claimed design. The broken lines showing the cable and power inlet elements in FIG. 1 are for the purpose of illustrating environmental structure and form no part of the claimed design.