Described are instruments for measuring troll depths of a line, of a known length, drawn through water and having a proximal line end out of the water and a weighted, distal line end in the water. The instruments include a reference to align with the line near the proximal line end to sense the insertion angle of the line. A nonlinear depth scale marks troll depths as a polynomial function of the length and angle of insertion, the angle of insertion measured relative to e.g. a horizontal or vertical reference.

Described are instruments for measuring troll depths of a line, of a known length, drawn through water and having a proximal line end out of the water and a weighted, distal line end in the water. The instruments include a reference to align with the line near the proximal line end to sense the insertion angle of the line. A nonlinear depth scale marks troll depths as a polynomial function of the length and angle of insertion, the angle of insertion measured relative to e.g. a horizontal or vertical reference.

A fishing line guide device for preventing snags and fish loss includes a rod and a cylinder. The cylinder is coupled to a bottom of the rod so that the cylinder is perpendicular to the rod. The rod is configured to be grasped in hands of a user, positioning the user to position the cylinder on a fishing line between a fishing pole and a hooked fish. The user is positioned to guide the line away from an obstruction as a fisherman reels in the line with the line sliding over the cylinder.

A fishing line guide device for preventing snags and fish loss includes a rod and a cylinder. The cylinder is coupled to a bottom of the rod so that the cylinder is perpendicular to the rod. The rod is configured to be grasped in hands of a user, positioning the user to position the cylinder on a fishing line between a fishing pole and a hooked fish. The user is positioned to guide the line away from an obstruction as a fisherman reels in the line with the line sliding over the cylinder.

A fishing system for fishing in a center console or smaller fishing boat in the big or rough seas is provided. The fishing system may include a teaser rigger mounted to the fishing boat, wherein a teaser release line is received through at least two pulleys and operatively associating a teaser to a boom. The fishing system may separately or in combination include a leader saver connected to a fishing rod in the fishing boat. The fishing system may separately or in combination include a non-skid material of fighting chair frictionally engaging a flat surface provided in the fishing boat.

This invention provides an outrigger assembly for fishing that can be quickly deployed from a portable bag about 1 meter long into a fully rigged outrigger in a selected length of 4 meters, 5 meters or 6 meters. Variable length is obtained by adding sections of telescoping pole. Quick deployment is obtained by using detachable line guides that are radially (or side) threadable in conjunction with a separate preassembled outrigger line loop for each deployed length. Different length outrigger line loop assemblies are color coded for quick identification. Stowed length and volume of the collapsed telescoping pole is minimized by the use of outrigger line guides that are removable from the outrigger pole. Threading and unthreading of an outrigger line loop without opening the loop is enabled by the radially threadable line guides. The invention also provides an outrigger holder having two sockets, one for the outrigger and one for a fishing pole.

A sidetracker includes a body including a first fin and a second fin spaced apart from the first fin. The first and second fins are coupled to the body. The first and second fins are configured to control a vertical position of the body in water through which the body is moving. A channel is formed in the body. The channel includes a first groove and a second groove. The first and second grooves cross each other. A wing is positioned in the channel. The wing is detachably coupled to the body. The wing is configured to rotate between the first groove and the second groove. The wing is configured to control a lateral position of the body in water through which the body is moving.

An underwater camera assembly is configured to be dragged behind a boat underwater. The camera assembly includes a housing having a hollow interior that is configured to hold a camera in waterproof manner. The camera assembly includes at least one rail disposed along an outer surface of the housing and being configured to slidingly receive and interlockingly engage a first accessory (camera positioning fin). The camera assembly can further include a second accessory (trolling fin) that is also interlockingly, yet releasably, engaged to the housing.

An underwater camera assembly is configured to be dragged behind a boat underwater. The camera assembly includes a housing having a hollow interior that is configured to hold a camera in waterproof manner. The camera assembly includes at least one rail disposed along an outer surface of the housing and being configured to slidingly receive and interlockingly engage a first accessory (camera positioning fin). The camera assembly can further include a second accessory (trolling fin) that is also interlockingly, yet releasably, engaged to the housing.

A trolling device for a boat includes a trolling motor and a control mechanism. The control mechanism controls at least one of the speed and the direction of the trolling motor. The control mechanism is configured to receive control instructions from an electronic GPS mapping computer to cause the trolling motor to maintain a controlled drift of the fishing boat with respect to an anchor point, water current rate, water current direction, wind, and/or wave action.