There are several considerations when determining whether the deck box and CTD underwater unit will be compatible.nn(1) In most cases (with the exception being (2), below), instruments with the "-plus" designation are compatible with each other, but the "-plus"...
Field Procedures & Deployment
How should I store the ISFET pH probe on my Navis BGC float, and what should I do before testing and deploying it?
The pH sensor will be shipped dry but was pre-conditioned in seawater (generally from Pacific Ocean waters near Hawaii). While conditioning and evaluating the pH sensor, only expose it filtered, sterilized natural seawater. Do not use seawater CRMs (Certified...
Why did my Navis float unexpectedly start its mission during pre-deployment testing?
There are two ways the N2 can start a mission without the user explicitly starting pressure activation or mission execute.nnNot Freezing the float:nIf the float is not frozen (I F command) and the dongle is removed, the N2 will eventually timeout. This is more of a...
What is the end-of-life behavior of the float?
The only warning of eventual failure is that prior to full battery depletion, the float will typically see a voltage drop with 5-15% of the float life remaining.
Is there any way to get the Navis to report the charge consumed so far?
Why does the cast header of my SBE19plusV2 data display “stop=stop command” when I did not issue a STOP command at the end of the cast? Why did my cast end unexpectedly?
This issue can have a few different causes. The most common cause is noise from your Data I/O connector on your CTD. This noise can be caused by a shorted serial deployment cable or water intrusion under the dummy plug on the I/O connector. nnTo solve this issue, we...
How will cell fouling affect my conductivity / salinity data?
Cells that have been contaminated with foreign material generally read low of the actual conductivity. Your zero (in air) conductivity reading is generally unaffected.nnThe conductivity error due to fouling will generally be proportional to the conductivity value....
What are the pros and cons of ordering wet-pluggable connectors? Can I mate and unmate a cable with this connector underwater?
Wet-pluggable (also referred to as wet-mateable or MCBH) connectors, an option on all of our underwater instruments, may be mated in wet conditions (click here for a photo comparison). Their pins do not need to be dried before mating. By...
What is the common or base environmental sensor suite, and what options are there for other sensors?
The base sensing suite includes a FastCat CTD, a combined fluorescence and turbidity sensor, and a PAR sensor. The current supported list of instruments for Thetis include: CTD: SeaBird FastCat CTD (SBE49) Dissolved oxygen: SeaBird SBE43 or SBE63 Chlorophyll: ...
How many/what kind of spares should I have on ship for my SBE 9plus?
The most complete backup system would be another SBE 9plus, to allow for very rapid system swaps. This is important if your stations are close together and there is limited time between CTD casts. However, it is the most expensive option.The next step down would...
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2024 MTS Buoy Workshop
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