Kauai Source Permitting NPAL Permits/ Authorizations NPAL Frequently Asked Questions Source Operations Summary Draft Environmental Impact Statement Final Environmental Impact Statement

Kauai source transmission summaries are available below. The NPAL sound source is located on the seafloor at a depth of 807 meters (2648 ft), approximately 8 nautical miles (14.8 km) north of the island at 22°20.94'N, 159°34.18'W. The typical transmission schedule consists of six 20-minute transmissions (one every four hours), every fourth day, with each transmission preceded by a 5-minute ramp-up period during which the signal intensity is gradually increased. The signals transmitted by the source have a center frequency of 75 Hertz (Hz) and a bandwidth of approximately 35 Hz. Approximately 260 Watts of acoustic power are radiated during transmissions. At 1 meter from the source, the sound intensity is about 195 decibels (dB) referenced to the intensity of a signal with a sound pressure level of 1 microPascal (µPa)(on a “water standard” basis). 2002-present Transmission schedule(Text File. Through September 17, 2006) Transmissions from the Kauai source ended following the final transmission on Sunday, 17 September 2006 (UTC), in accord with the Letter of Authorization (LOA) and the regulations governing the taking of marine mammals incidental to operating the NPAL low- frequency acoustic source north of Kauai issued by the National Oceanic and Atmospheric Administration.