A boat tethering and launching system and device including a first longitudinally extending length of tethering material having a first modulus of elasticity, the first length of tethering material having a first end and a second end; a second longitudinally extending length of tethering material having a second modulus of elasticity, the second length of tethering material having a first section, a second section, and a third section, the second end of the first length of tethering material being coupled to the first section of the second length of tethering material; a biasing member having a length that is shorter than that of the second section of the second longitudinally extending length of tethering material, the biasing member having a third modulus of elasticity; and wherein each of the first, second, and third moduli of elasticity have different values.