This is the first of what I hope are many columns on useful tools for the oceanographer. By tools I mean software, hardware, or data that we use to do our job. I will try to focus on tools that are of general utility to all oceanographers and that may have educational value.

Atkinson, L. 1994. BILKO. Oceanography 7(1):31, https://doi.org/10.5670/oceanog.1994.16.

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