In contrast to commercial shipping, recreational shipping is non-commercial shipping on inland waterways or in sea areas. The size of the ship is not the decisive factor.
Recreational craft demonstrate the right to fly the federal flag with a flag certificate. Depending on the size, either a simplified or an exact measurement is carried out for recreational craft.
The collision prevention rules (COLREGs) also apply to the equipment of a recreational craft, but the specifications for the lights, for example, are dependent on the size of the craft.