An optical fiber guided projectile for firing from a generally tubular launcher comprising a tubular casing, an extended length of optical fiber disposed in the casing for continuous streaming from the trailing end thereof, a portion of the fiber extending from the casing for operative connection to a controller, an axial groove in the casing surface for removably receiving a part of the extending fiber, tape securing the fiber part in the groove with force sufficient to withstand axial launch forces but insufficient to resist imposed radial forces, and a communication device providing two-way communication over the fiber. A controller is also provided in two-way communication with the projectile for receiving and processing target data from the projectile and for transmitting guidance data, including operator manual guidance, to the projectile.