Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p233
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 665146–668211

used;
8. A. 002. o. Propellers, power transmission systems, power generation systems and noise reduction systems, as follows:
1. Not used;
2. Water‑screw propeller, power generation systems or transmission systems, designed for use on vessels, as follows:
a. Controllable‑pitch propellers and hub assemblies, rated at more than 30 MW;
b. Internally liquid‑cooled electric propulsion motors with a power output exceeding 2.5 MW;
c. "Superconductive" propulsion motors with a power output exceeding 0.1 MW;
d. Power transmission shaft systems incorporating "composite" material components and capable of transmitting more than 2 MW;
e. Ventilated or base‑ventilated propeller systems, rated at more than 2.5 MW;
A. 002. o. 3. Noise reduction systems designed for use on vessels of 1,000 tonnes displacement or more, as follows:
a. Systems that attenuate underwater noise at frequencies below 500 Hz and consist of compound acoustic mounts for the acoustic isolation of diesel engines, diesel generator sets, gas turbines, gas turbine generator sets, propulsion motors or propulsion reduction gears, specially designed for sound or vibration isolation and having an intermediate mass exceeding 30% of the equipment to be mounted;
b. 'Active noise reduction or cancellation systems' or magnetic bearings, specially designed for power transmission systems;

Technical Note:
                  For the purposes of 8A002.o.3.b., 'active noise reduction or cancellation systems' incorporate electronic control systems capable of actively reducing equipment vibration by the generation of anti-noise or anti-vibration signals directly to the source
8. A. 002. o. 4.  Permanent magnet electric propulsion motors specially designed for submersible vehicles, having a power output exceeding 0.1 MW.
    Note: 8A002.o.4. includes rim-driven propulsion systems.
8. A. 002. p. Pumpjet propulsion systems having all of the following:
1. Power output exceeding 2.5 MW; and
2. Using divergent nozzle and flow conditioning vane techniques to improve propulsive efficiency or reduce propulsion‑generated underwater‑radiated noise;
8. A. 002. q. Underwater swimming and diving equipment as follows:
1. Closed circuit rebreathers;
2. Semi‑closed circuit rebreathers;
Note: 8A002.q. does not apply to individual rebreathers for personal use when accompanying their users.
N.B.: For equipment and devices specially designed for military use, see ML17.a. on the Munitions List.
8. A. 002. r. Diver deterrent acoustic systems specially designed or modified to disrupt divers and having a sound pressure level equal to or exceeding 190 dB (reference 1 µPa at 1 m) at frequencies of 200 Hz and below.
Note 1: 8A002.r. does not apply to diver deterrent systems based on underwater explosive devices, air guns or combustible sources.
Note 2: 8A002.r. includes diver deterrent acoustic systems that use spark gap sources, also known as plasma sound sources.
8. B  Test, Inspection and Production Equipment
8. B. 001. Water tunnels designed to have a background noise of less than 100 dB (reference