FIG. 1 is a front perspective view of a marine radio, embodying our new design;

FIG. 2 is a rear perspective view of the marine radio;

FIG. 3 is a top view of the marine radio;

FIG. 4 is a front view of the marine radio;

FIG. 5 is a left side view of the marine radio;

FIG. 6 is a right side view of the marine radio;

FIG. 7 is a rear view of the marine radio; and,

FIG. 8 is a bottom view of the marine radio.

Portions of FIGS. 1 through 8 are shown in dashed lines for illustrative purposes only and form no part of the claimed design.