LADCP Deployment and Recovery
=============================

This section refers to the procedure involving the instrument,
cables, power, and rosette.  Basically, it is the part of the 
procedure you  carry out in association with deployment and 
recovery of the rosette.

.. _hardware_deployment:

LADCP procedures for deployment
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

When approaching a station to do a CTD cast, 
you need to have the instrument pinging and disconnected
from power and communications (with cable ends properly
dummied and secured) before the rosette is ready to deploy.
Depending on your comfort level with all the steps and the status
of the rosette, this could be as little as 5 minutes before "on station".
However, we (the LADCP people) **DO NOT** want to be responsible for 
any delay in deploment.  Often the instrument is made to ping
more like 10-15 minutes before arrival on station.  The longer the
instrument pings on deck, the greater the file size to download,
and the longer the battery will have to recharge.  But, we do not
want to get in the way or cause any kind of delay.  At the beginning
of a cruise, err on the side being "ready to deploy" with time to spare, 
and later in the cruise trim that time down as the situation allows.

The LADCP operator may also help deploy the rosette.


**15-20 minutes before "on station"**: 


1. Start a new acquisition logsheet (See :ref:`this example logsheet<example_logsheet>`)
  
2. Start data recording (see Section :ref:`software_deployment`) and 
   **write down** time when the instrument starts pinging

3. Turn power supply off (if it was on):
     * if SOB charger: turn off switched power (eg power strip)
     * if Amrel power supply: toggle lower right-hand-side button.
       Power supply display should say "ALL OUTPUT OFF".
       Do not use the rocker switch to turn the whole unit 
       off and on; use the electronic toggle instead.  (TDK-Lambda
       power supply operation is similar to Amrel)

4. Disconnect cables, dummy, secure:
     * In hangar, disconnect power/communication cable(s)
     * Dummy off the connector(s) to cables on the rosette frame
     * Secure the rosette cables cable(s) with bungies
     * Dummy off the connectors to power/communication cable
     * Secure the lab cables cable(s) in the hangar

The LADCP instrument is ready to go.

.. _hardware_recovery:

LADCP procedures for recovery
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The rosette is brought on board.  People are milling about, anxious to
start sampling.  The LADCP person should be standing by (or maybe that
person helped with the recovery), and as soon as the rosette is
officially "secured", before sampling starts, the LADCP person 
should connect the cables for power and communication.

The LADCP person may participate in drawing water for salts or other
rosette sampling, as long as they are able to monitor the download and
charging process, assess the quality of the data (pass/fail) and
perform any necessary troubleshooting.  Helping with the sampling is
up to the workload and interest of the LADCP operator: it is not one
of our requirements.

1. Output from the power supply or charger should be **OFF**. 
**This is a safety precaution**  for persons and equipment. 
**Double-check** if in doubt.

2. In the hangar, before water sampling starts:
     * Rinse the connector with fresh water and dry
     * Remove the dummy from the rosette end
     * Dry off any droplets of water (use a Kimwipe)
     * Connect the power/communication cable to the instrument 
     * Gently secure the cable to the rosette with the bungie, and 
       suspend the remainder of it with the parachute cord (to be away
       from the wet floor and the scientists in charge of sampling)

3. In the wet lab, toggle power on (lower right-hand button on the 
   Amrel power supply, or turn on power strip) to charge the SOB.

4. Download and check the data (see Section :ref:`software_recovery`).

5. Once the battery is charged (drawing 0.5A/channel or green light is on) 
   toggle off power.