Today's dive computers are
loaded with bells and whistles, but
how reliable are they? If your computer
goes out while you're on a
dive trip, you could lose valuable
diving days. Or even your life.
We recently polled
Undercurrent subscribers whose
computer complaints fell into four
categories: battery problems, inaccurate
or unreadable displays, loss
of data transmission in hoseless airintegrated
(AI) models, and manufacturers
failing to support older
units. Hoseless AIs created so
many problems, we'll report them
separately in the next issue.
These are some of the problems that can occur, what some
divers have done to cope with
them, and how dive shops and
manufacturers handle the problems.
(That's why we've included
reports on some models that are
no longer on the market.)
And there is a lesson here:
Too many models of dive computers
are quirky and unpredictable.
For the prices we divers pay, we
should get better reliability. Until
we do, to be a safe diver requires
diving with a backup.
Computer Batteries Lead to
Aggravating Incidents
As you'll see from the following cases, many computer models
have battery problems and have
not always been dependable on
dive trips - more evidence why a
backup is essential.
Ronald Deutch bought two
Oceanic Datamax Pro Plus computers
in 1999. One has always
worked perfectly. The other "eats
batteries quickly and failed with a
new battery during a dive," he says.
He returned the original and was
sent a factory-refurbished replacement,
but the problem persisted.
"Despite checking the battery and
finding it was at full strength," he
points out, "the batteries do not
always power the unit. Two batteries
can both test good, but one will power the unit and the other will
not." He hasn't had this problem
with the other unit purchased at
the same time.
Jerry Horn (Seattle) found
that his Suunto Mosquito suddenly
quit working after a year's
worth of dives. The battery indicator
was showing low power
before that failure. The battery
was replaced, but the replacement
went dead in a day. Two
more were chewed up before it
was obvious the Mosquito was
sucking the batteries dry in a day.
Horn took the Mosquito to his
local Aqua Lung outlet, and they
forwarded it to a repair station. "I
got a new Mosquito in two weeks," he says. "No charges. A
happy ending."
When one subscriber's Aeris
Atmo Sport was recalled, he
hoped that would be an opportunity
for the manufacturer to do
something about the short battery
life (20 dives at best, he reports).
The recall problem got fixed, but
the battery life remained short. He
tried several batteries, without success.
"It finally flooded in June of
2003, and good riddance," he
reports. "It forced me to get another
dive computer, which I am completely
happy with."
Similarly, Bruce Robertson
(Keizer, OR) had to replace batteries in his Aeris 300g twice before
he got 60 dives on it. His dive shop
returned it to Aeris, and he
promptly received a replacement.
"This replacement computer lasted
1 or 2 dives before the display
segments started to disappear. By
the end of the second dive, most
of the display had disappeared."
That unit was also replaced, but
the new unit lasted just 40 dives,
more than nine months before its
display abruptly failed. This time
his dive shop owner dealt with
Aeris to get him a reasonable deal
on a different computer, the
Atmos AI (air integrated). "I am
quite satisfied with the new unit
and with the customer service I
receive from the local dive shop and from Aeris," he says, "even if I
wasn't pleased with the 300g."
"I have an Oceanic Datamax
Pro Plus that, when it's working, I
like very well," says Mike Boom
(Oakland, CA). "But last fall, when
it was a little over a year old, it
showed a low battery symbol,"
during a trip to Catalina. Boom
put in a new battery, but after a
couple of dives the computer
showed that one was low as well.
"This went on until I was almost
out of batteries," he recalls. Then
"it stopped working completely
when I tried turning it on with a low battery. It showed an erratic
display with LCD segments that
shouldn't be on." Oceanic
replaced it, but the new computer
"was finicky about batteries as
well, occasionally showing a fresh
battery as low, then showing it as
fine a little later." After getting a
low battery sign while diving in
Monterey, Boom tried to put it
into log mode. First the display
went blank. Ten minutes later it
was working again but had erased
all his nitrogen load data. When
he wrote to us, Boom was headed
to Wakatobi and was taking a
backup computer and pressure
gauge just in case. "In Oceanic's
defense," he says, "they've been
excellent about replacing my
computers with no hassle."
"Some unused batteries develop a coating on the
inside that drains power. Often whacking the
battery on a hard surface can rejuvenate it." |
Harry A. Kreigh (Sacramento)
was 100 feet down off Cocos Island
last year when his Aeris Atmos 2
wrist computer's battery compartment
flooded. "Not a good feeling!"
is how he recalls the
moment. His attempts to reseal the compartment were unsuccessful.
"Fortunately," Kreigh recalls, "I
had my reliable Skinny Dipper
[manufactured by Orca and no
longer available] as a backup for
the rest of the trip (no problems in
15 years of use!)." He returned the
Aeris to Leisure Pro but reports
that "it took considerable effort,
complaints, and nearly two months
before they replaced it. The new
one works fine!"
Robert O'Meara (Ipswich,
MA) had made about 30 dives
with his Aeris 500AI, which he'd
owned for a year. After it sat for a few months, he says, it wasn't
working properly. Thinking the
battery had died, he opened the
compartment and discovered that
the batteries had corroded,
although he saw no salt water
residue. So he contacted Aeries,
and they told him to send them
the computer. "Less than two
weeks later," he notes, "I was sent a
replacement computer: all covered
under warranty."
Many computers sit dormant
for months between dive trips.
During that time batteries can run
down. Jim Wittstruck of Zeagle (see
sidebar) tells us that some unused
batteries may develop an insulating
coating on the inside. When the
computer is eventually started, it
drains extra power from the battery
to burn off this layer. Often the battery
can be rejuvenated by whacking
it on a hard surface.
To avoid problems like these,
you can play with your computer
every few weeks, even when you have no diving planned. Some
divers change batteries before
every trip to ensure they're fresh.
For sure, check out your computer's
operation several weeks before
you depart to give you time to get
a replacement if it's not working.
For example, Peter Dickinson
(Glendale, AZ) discovered that his
3-year-old Seaquest (Suunto) Eon
had failed three weeks before a
dive trip. He returned it to
Seaquest, and they replaced it with
a new unit, offering the option of
upgrading to the LUX Eon for
about $50. Dickinson stayed with
the standard model. "I was computer-
less for maybe two weeks and
was very happy with Seaquest's
response to my needs. I have since
relegated the Eon to backup/loaner
status as I have moved up to the
Seaquest Cobra."
Carrying backup batteries is
always a good idea, and they're
often cheaper to buy at home
rather than a remote dive destination
... if they're available at all.
The Disappearing Computer
Display
Joe DiDia (Novi, MI) has had
three Oceanic Data Plus II units fail
"with very little dive time on them."
He reports that Oceanic has
replaced each unit in a timely manner.
During a trip to Cozumel, one
unit failed 20 minutes after the first
dive -- the display would only flash
On/Off. The next day, the second
computer failed the same way. Two
years later, in Grand Cayman, his
replacement fizzled out exactly as
the others had two years before.
"Since my warranties had expired,"
he recalls, "I called Oceanic and
explained the situation. I sent them
a letter and included the failed unit
and copies of the letter from 2001.
They replaced the third unit without
issue."
Rick and Donna Ramsey
(Escondido, CA) bought a pair of Oceanic Versas in 2002. In
October of that year, parts of the
number display disappeared from
Donna's computer interface. It
took Rick a week to get a return
authorization number, and then
the computer was replaced. But
the same problem arose again a
year later. Ramsey still had the email
address of the service person
from the first time and says, "I got
a return authorization number in
less time, and the computer was
replaced again." "With both computers
replaced at no charge in
less than a month," Ramsey says, "I
was satisfied with Oceanic's
response and service."
"Three years ago, on a dive
trip to Tonga," says David
Dornbusch (Berkeley, CA), "one
of my family's four Oceanic Data
Max Pro Plus computers failed. The screen went blank on the first
dive and never recovered. The battery
was fine. There was no leak. I
returned the computer and
Oceanic replaced it."
Phil Freed (Phoenix) and a
friend each bought Sherwood
Wisdoms. Freed's worked fine on
Florida and Cozumel dive trips.
But during a lake dive in Arizona,
his buddy's Wisdom "went into
deco mode, erroneous air pressure
readings, etc.," says Freed.
Sherwood promptly replaced it.
Then, in Maui, Freed's LED screen
just faded out on his first dive. A
new battery didn't help. "Since my
Wisdom was air integrated with my
new Maxis Regulator, and my octopus
was the TUSA Duo Air, I could
not use any compatible rental gear
with my new Dive Rite BC. Talk
about pissed! I had to rent ALL my gear." Sherwood also replaced that
Wisdom, but Freed and his dive
shop "are waiting for an explanation
from Sherwood." He says, "I
suppose I have to go buy a backup
computer to my $600 Wisdom."
If you don't like the idea of toting
a backup computer, you can
check ahead with your resort or
live-aboard to see if rental or loaner
units are available in case of a failure.
If your computer goes down
you may lose a day of diving, but at
least you'll be able to continue again
after sitting out for the suggested
24 hours when switching computers.
By the way, DAN and the
British Sub-Aqua Club recommend
taking a day off from diving in the
middle of a week of multi-dives.
Next issue: air-integrated
problems.