Oceanic DataTrans Plus, Owner'S Manual

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At m osph er ic pr essu r e decr eases as alt it u de in cr eases above sea level. Weat h er
syst em s an d am bien t t em per at u r e also affect bar om et r ic pr essu r es. Con se-
qu en t ly, dept h r eadin g in st r u m en t s t h at do n ot com pen sat e for t h e decr ease in
pr essu r e in dicat e dept h r eadin gs sh allower t h an t h e dept h t h ey ar e act u ally at .
Th e Dat aTr an s P lu s au t om at ically com pen sat es for decr eased am bien t pr es-
su r e wh en act ivat ed at h igh alt it u des u p t o 14,000 feet (4,267 m et er s). It s pr o-
gr am con t ain s a h igh alt it u de algor it h m t h at r edu ces n o decom pr ession an d
oxygen exposu r e lim it s t o add a lar ger zon e of cau t ion .
Wh en ever t h e Dat aTr an s P lu s is m an u ally act ivat ed at alt it u des h igh er t h an
2,000 feet (610 m et er s), it will au t om at ically r ecalibr at e it self t o m easu r e dept h
in feet of fr esh wat er r at h er t h an feet of sea wat er . Th er efor e, wh en r et u r n in g
t o lower alt it u des, divin g sh ou ld n ot be con du ct ed u n t il t h e Dat aTr an s P lu s au -
t om at ically clear s of an y r esidu al n it r ogen an d oxygen loadin g an d r eset s t o op-
er at e at t h e n ew alt it u de.
WARN IN G: Alt it u de c o m pe n sa t io n pro vide d by t h e D a t a Tra n s
P lu s t a ke s pla c e w h e n t h e u n it is a c t iva t e d. D O N OT dive a t
a n y diffe re n t a lt it u de u n t il t h e D a t a Tra n s P lu s sh u t s o ff. It w ill
a u t o m a t ic a lly re c a libra t e w h e n re a c t iva t e d a t t h e n e w a lt it u de .
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