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NN310 FINAL EXAM 2024 VERIFIED 100% CORRECT!!
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NN310 FINAL EXAM 2024 VERIFIED 100% CORRECT!!
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NN310 FINALEXAM 2024
VERIFIED 100%
CORRECT!!
Evatee 10/2/24 NN310
,NN310 FINAL EXAM 2024 VERIFIED 100%
CORRECT!!
•Discuss factors to be considered for the voyage planning Answer - 1)
determine port departure/arrival and date
2) Determine chart/pub requirements
3) Determine distance and SOA
4) Plan the passage
5) Prepare to get underway
6) Underway
•Compute speed of advance, ETA and ETD required in voyage planning Answer
- SOA= Total Distance(NM)/ Total Time(HRs)Practice with Practical Exercise
•Know how the Navigator determines a route that covers a great distance using
Great Circles and Rhumb lines Answer - The shortest distance between two
points on Earth is a Great Circle.
A Rhumb line is a straight line between two points on Earth
By using a composite approach of both GC and RL, a navigator can determine
the quickest route between two points that are very far apart.
•Know the 25 time zones Answer - YXWVUTSRQPON-Z-ABCDEFGHIKLM
,•Determine time zones and make time zone conversions Answer -
DDTTTTZMMYY
•Discuss in-port and pre-underway messages and arrangements Answer - 1.
MovRep
2. OTSR (Optimum Track Ship Routing) (includes requesting WEAX)
3. Logistics Request (LOGREQ) message
4. Navigation Brief (NAV Brief)
•Discuss underway messages, reports and orders Answer - Prior to going
underway, a navigator must route up a Movement Report (MOVREP) twenty-
four to forty-eight hours prior to departure. This MOVREP tells where the ship
is going, speeds, waypoints, times, and stops. Embedded in the MOVREP is a
Plan of Intended Movement (PIM) that describes where your ship intends to be
based on SOA and ETA.
MOVREP: Upon arrival in port, or when +/- 4 hours outside of Plan of Intended
Movement, or Fail to Sail.
Included in a MOVREP is the WEAX and OTSR
•WEAX (Weather Forecast)
-If you request WEAX along your PIM (Plan of Intended Movement), you will
get daily weather forecasts for your location and forecasts up to 72 hours out,
from your closest METOC Center.
•OTSR (Optimum Track Ship Routing)
-Requested to the Fleet Weather Center (FWC-N/SD) 7-10 days prior to u/w for
voyages >1500 NM.
, -Every day at 0800 local, the ship sends an updated position and current
weather status. If she will encounter severe weather along the route, FWC will
send her a safer alternate route to follow.
•Logistics Request (LOGREQ) message
-Routed through every Department Head
-Submitted prior to arrival/departure in a port
-Indicates what services you will require
Includes, ETA, ETD, fuel, water, food, tug and pilot services, etc
•Navigation Brief (NAV Brief)
-Given to all concerned watch standers involved in a Sea & Anchor detail within
24 hours of the detail being set.
-Written and briefed by Navigator, with contributions by the 1st LT, Operations
Officer, and Chief Engineer. Signed by the Commanding Officer.
-Retained onboard for 1 year
Position Report
Delivered 3 times daily to CO. Reports at (0800, 1200, 2000)
•Become familiar with the principal types of Electronic charts Answer - RNC
(Raster Nautical Chart),
ENC (Electronic Nautical Chart),
DNC (Digital Nautical Chart)
•Understand the key differences, advantages and disadvantages of Raster and
Vector charts Answer - Raster:
created by scanning a paper chart. Common formats are .jpeg, .gif, .bmp
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