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New ACO instruments were installed during the ACO-3 cruise on 2014/11/01. Click here for ACO-3 videos.

Welcome to the ALOHA Cabled Observatory Database

The ACO project is committed to providing free and open access to its data set in a timely manner, and the use of these data is encouraged. Every 8 hours, we are posting updated files of near-bottom temperature, salinity and current velocities. These data are from sensors sampled at 1 sec intervals, except pressure which is collected at 0.5 sec intervals. Data are calibrated using manufacturers calibration information. See associated Readme files for metadata.

The continuing flow of these data depends on continuous funding, and that depends in part on the credits that we given from the data users. If you use ACO data in your project, we would appreciate your acknowledgment of the ACO project. The following should be cited in publications: "This publication is based upon ALOHA Cabled Observatory observations supported by the U.S. National Science Foundation under grant OCE-1539244" A preprint and reprint of the publications utilizing ACO data would be appreciated.

Please also consider the benefits of possible scientific collaborations in the analysis of these data. If you use these data in your project, please contact the principal investigators Bruce Howe and Roger Lukas to avoid possible duplication of efforts.

Bruce Howe, PI
Department of Ocean and Resources Engineering
University of Hawaii at Manoa
2540 Dole Street
Honolulu, HI 96822
e-mail: bhowe at

Roger Lukas, PI
Department of Oceanography
University of Hawaii at Manoa
1000 Pope Road
Honolulu, HI 96822
e-mail: rlukas at