Undersea plow

An undersea plow for digging a trench by towing the plow along the floor of a body of water, comprising:

• a soil spreader which is a semi-cylinder with first and second coplanar, vertical faces at the edges of said semi-cylinder, the axis of which lies in a plane horizontal to said floor, transverse to the path of said trench;
• a blade which has a planar, vertically-elongated hexagonal shape defining a plane transverse to the path of said trench, said blade also being about two-fifths as wide as said spreader and about as high as said spreader is wise, said blade being rigidly attached to said first and second vertical faces of said spreader at a point where the vertical midline of said blade bisects the width of said spreader and the horizontal midline of said blade is colinear with said axis of said spreader so that the combination of blade and spreader defines a symmetrical relationship about a horizontal line of symmetry through the center point of said blade and perpendicular thereto;
• a blade stabilizer which is a vertical, rectangular plate of height about equal to that of said blade, having a trailing edge rigidly attached to said blade on the same side thereof as said spreader, with a semi-circular portion cut out at the middle of said trailing edge to accommodate fitting said stabilizer over said spreader, said stabilizer being attached along said vertical midline of said blade, perpendicular to both said blade and said spreader, thereby preserving said symmetrical relationship;
• a pilot means including,
• a nose which is a semi-cylinder with a radius equal to that of said spreader, width about equal to that of said blade, and whose axis is horizontal and parallel to that of said spreader, there also being first and second faces at the edges of said semicylinder to which edges are attached;
• fins which are rectangular, have a width equal to that of said nose and are arrayed in an angular relationship which defines planes that are each swept back from said semi-cylinder in a range of from about 30.degree. to 40 .degree. from vertical;
• two connecting members which are beams laid out in a plane horizontal to said floor, the forward ends of said beams placed directly adjacent to each other and are rigidly attached to the middle of the concave side of said nose, the opposite ends of said beams rigidly attached to the convex side of said spreader, said opposite ends separated by a distance slightly greater than the width of said nose, so that said beams have a V-shaped configuration in said horizontal plane and the bisector of said Vshape is parallel to the path of said trench, bisects the width of said nose, fins, and spreader and is colinear with said line of symmetry about which the entire plow is symmetrical.