FIG. 1 is a front elevational view of a portable sonar unit for fishermen showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being a mere image thereto;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a top left rear perspective view thereof.