5-3 ·    Communicating with other departments in the ship · Activating alarms You may be familiar with some of this equipment. Only the equipment that is important to the POOW will be described. Internal Communications At  times  during  your  POOW  duties,  you  will  be required to communicate with personnel in various parts of your ship. You should have a working knowledge of the    mass    communication    (MC)    systems—sound- powered telephones, voice tubes, pneumatic tubes, and ship's  service  telephones.  For  more  information  on internal   communication   equipment,   refer   to   Basic Military Requirements, NAVEDTRA 12018. Logs, Records, and Reports As you stand petty officer of the watch, you will be required to maintain various logs, records, and reports. If  your  ship  is  in  port,  you  may  have  to  maintain  a weather log. The equipment you will use to take weather readings  will  be  covered  later  in  this  chapter.  In  this section you will be looking at the ship's deck log and also at several other logs, records, and reports. SHIP’S     DECK     LOG.—Probably    the    most important log you will be maintaining is the ship's deck log. The basic requirements for maintaining the ship's deck log are contained in U.S.  Navy  Regulations and Standard  Organization  and  Regulations  of  the  U.S. Navy.  A  more  detailed  explanation  can  be  found  in OPNAVINST 3100.7. The ship's deck log is a complete daily  record,  by  watches,  of  every  circumstance  and occurrence of importance or interest about the crew and the operation and safety of the ship. A ship's deck log has both historical importance and legal  standing.   It   may   be   used   at   times   in   naval, admiralty, and civil courts. In an incident involving the ship, the log may be the only available evidence upon which to base a legal decision. At sea the quartermaster of   the   watch   keeps   the   ship’s   deck   log.   In   port, chronological  entries  are  made,  but  these  entries  are made by the POOW. Entries in the ship's deck log should be handwritten with a black ballpoint pen or typewritten. Entries must be    neat    and    legible.    Use    only    standard    Navy phraseology. Because the log may be used as evidence in legal proceeding, erasures are not permitted. If you make a mistake, draw a single line through the original entry (so that it remains legible), insert the correct entry, and place your initials in the left margin. The log is signed at the end of each watch by the OOD. The name of the officer  of  the  deck  also  must  be  printed  beneath  the signature.   Facsimile   signatures   are   not   acceptable. Figure 5-1 is an example of a deck log sheet. In keeping the log, remember two important points: (1) All entries must be clear, concise, and accurate; and (2)  every  entry  must  be  preceded  by  the  time  of  its occurrence or when the information becomes known. In some instances, the OOD will tell you what to note and when; but normally you are expected to make proper, standard entries on your own without being told. If you are in doubt as to whether or not an entry should be made, check with the OOD. The overall responsibility for the deck log belongs to the OOD. OODs must sign the deck log at the end of their watch to show relief of the watch and validity of entries. The following are a few of the entries that are always recorded: 1. Convening of courts-martial or fact-finding bodies 2. Inspections  held,  including  administrative, material,     personnel,     lower     deck,     and magazine inspections 3. Injuries, accidents, and casualties 4. Official visits 5. Salutes fired and flags displayed 6. Arrivals and departures of the commanding officer and executive officer and, if on board, flag officers and civil officials 7. Drills held 8. Observance of sunrise and sunset