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April 2019    Download the Entire Issue (PDF) Vol. 34, No. 4   RSS Feed for Undercurrent Issues
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Old Dive Computers, Odd Treatment: Letters to the Editor

from the April, 2019 issue of Undercurrent   Subscribe Now

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David Hollabaugh (Fulton, MO) wrote in to disagree with John Bantin's article, "Is Your Old Dive Computer Still Safe?" in last month's issue.

"I am a 66-year-old male, diving since 1975, with 473 dives logged. I have done 269 of those dives on an Orca Marathon computer since 1994, most recently in January. The Marathon uses a modified Haldanean algorithm. In your article, you asked, 'Can it be set for nitrox?' No, but I don't use nitrox. 'Does it allow you to set degrees of caution?' No, I set my own, i.e., I don't use at high altitude, I never get closer than five minutes to required decompression, I always make a safety stop, and I do not begin a repetitive dive until I have at least 45 minutes available at 60 feet. 'Does it tell you how long your air will last?' No, I use my pressure gauge. 'Can you read and understand the display easily?' Yes. The battery is user-replaceable, although I am still on the original battery after more than 24 years."...


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