A launch canister delivery system comprising: a sleeve configured to fit within a barrel of an air cannon, the sleeve having a closed end and an open end, the closed end including a driving disk configured as a reaction plate upon which high velocity pressurised air can act to propel the launch canister delivery system; the sleeve packed with a part of a floating boat fouling line having first and second ends, wherein the floating boat fouling line comprises: a length of high-strength, lightweight cord defining the first and second ends and a central section of the boat fouling line; a first rotating shackle and a second rotating shackle (31 Ob), the first rotating shackle coupled to the first end of the cord and the second rotating shackle coupled to the second end of the cord; at least two drogues (304, 306) each having multiple shroud lines extending from a canopy thereof; and wherein the shroud lines from a front drogue are attached to the first rotating shackle and shroud lines from a tail drogue are attached to the second rotating shackle, the rotating shackles both acting as a sink weight to cause, when deployed in water, submersion of the respective canopy of each drogue and to isolate twisting of the central section of the high-strength cord from twisting of said shroud lines 312 and/or closure of said canopy of each drogue (304, 306), and wherein the packed part is the front drogue, the first rotating shackle and a portion of the central section of the high-strength cord. a sleeve configured to fit within a barrel of an air cannon, the sleeve having a closed end and an open end, the closed end including a driving disk configured as a reaction plate upon which high velocity pressurised air can act to propel the launch canister delivery system; the sleeve packed with a part of a floating boat fouling line having first and second ends, wherein the floating boat fouling line comprises: a length of high-strength, lightweight cord defining the first and second ends and a central section of the boat fouling line; a first rotating shackle and a second rotating shackle (31 Ob), the first rotating shackle coupled to the first end of the cord and the second rotating shackle coupled to the second end of the cord; at least two drogues (304, 306) each having multiple shroud lines extending from a canopy thereof; and wherein the shroud lines from a front drogue are attached to the first rotating shackle and shroud lines from a tail drogue are attached to the second rotating shackle, the rotating shackles both acting as a sink weight to cause, when deployed in water, submersion of the respective canopy of each drogue and to isolate twisting of the central section of the high-strength cord from twisting of said shroud lines 312 and/or closure of said canopy of each drogue (304, 306), and wherein the packed part is the front drogue, the first rotating shackle and a portion of the central section of the high-strength cord. a length of high-strength, lightweight cord defining the first and second ends and a central section of the boat fouling line; a first rotating shackle and a second rotating shackle (31 Ob), the first rotating shackle coupled to the first end of the cord and the second rotating shackle coupled to the second end of the cord; at least two drogues (304, 306) each having multiple shroud lines extending from a canopy thereof; and wherein the shroud lines from a front drogue are attached to the first rotating shackle and shroud lines from a tail drogue are attached to the second rotating shackle, the rotating shackles both acting as a sink weight to cause, when deployed in water, submersion of the respective canopy of each drogue and to isolate twisting of the central section of the high-strength cord from twisting of said shroud lines 312 and/or closure of said canopy of each drogue (304, 306), and wherein the packed part is the front drogue, the first rotating shackle and a portion of the central section of the high-strength cord.