A carriage (17) is mounted on a track (11) and has a receiver (21) docking a weight-biased, capsule (20). A line (22) is secured axially to the capsule (20), passes through the receiver (21), and over a pulley (16) to a winch (31). The receiver (21) has a docking recess (36). The carriage (17) is secured to a launching line (40) which passes about a pulley assembly (41) mounted at the bottom of the track (11) to a launching winch (43). The capsule assembly (20) has a docking portion (46), an open lower end (47), a bait cavity (50) accessed through a baiting opening (53) and a slot (55) connecting the opening (53) with the open end (47). A closure (60) is biased closed across the open end (47) and has an outer conical surface (61). An inner conical surface (62) forms a radially divergent egress (48) for a bait passing from the bait cavity (50) to the outside. A bait is placed in the capsule, the launch winch (43) is activated to drive the carriage (17) down. The capsule (20) is launched by its own momentum. The winch (31) retrieves the limit line, water flushing the bait out past the closure (60) against its bias. On docking of the capsule (20), the retrieval of the limit line (22) causes the capsule (20) and carriage (17) to be drawn to the baiting up position awaiting the next operator-triggered cycle.
