5-2 · Assist  the  OOD  and  the  junior  officer  of  the watch (JOOW) and supervise and instruct sentries and messengers. · Wear    the    prescribed    uniform    and    ensure orderliness  of  watch  standing  equipment  during  each morning watch. · Carry  out  the  daily  routine  and  orders  as  the OOD may direct. · Notify the OOD and the JOOW of any changes in   the   weather   or   changes   in   barometric   pressure readings  of  .04  inch  or  more  in  any  one  hour.  The quartermaster of the watch, when assigned, will assume this responsibility. · In all classes of submarines, hourly observe and log draft readings. Ensure draft readings are reviewed periodically by the in-port duty officer. · Make entries in the deck log for all events of interest as directed by the OOD. Erasures should not be made in the deck log. The quartermaster of the watch, when assigned, will assume this responsibility. · Ensure the messenger makes the calls listed in the call book kept on the quarterdeck. The quartermaster of    the    watch,    when    assigned,    will    assume    this responsibility. · Return salutes and carry out the watch routine for  the  OOD  or  the  JOOW  when  neither  is  at   the gangway. · Call away boats in sufficient time to make sure that   they   are   ready   to   leave   the   ship   at   the   time prescribed in the boat schedule. · Keep a list of personnel (such as boat crews) expected to be absent on duty from the ship during meal hours. Notify the ship’s duty cook of the approximate number of  personnel  that  will  be  absent  and  the  time they will return for the meal. · Assemble   liberty   parties   in   ample   time   for inspection by the OOD before departure of scheduled liberty boats. · Perform other duties as directed by the OOD or JOOW. These  duties  may  seem  like  a  lot  to  do  while  on watch, but you probably have observed and are familiar with many of them, having stood sentry or messenger watches in the past. While you are standing POOW, you should be alert for the display of significant flags and pennants from other ships. You should ensure the correct display on your ship. This area will be covered later in this section. Another of your responsibilities is knowing how to operate any of the equipment found on the quarterdeck and bridge. Quarterdeck and Bridge Equipment The Navy has many different types and classes of ships. Each ship type has installed equipment to enable that ship to do its job. It would be impossible to describe each and every piece of equipment that can be found on the bridge of each ship. Each ship in the Navy contains instruments   or   apparatuses   that   are   used   for   the following purposes: · Steering · Depth sounding · Indicating ship’s head · Indicating rudder angle · Measuring speed · Measuring temperature and atmospheric pressure · Measuring wind direction and speed · Communicating speed orders to engine room · Taking bearings and ranges · Making celestial observations · Controlling running, anchor, aircraft, and warning lights · Indicating revolutions made by the engines