Nn310 Final Exam | 116 Questions | With Actual Solutions!!

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NN310 FINAL EXAM | 116 QUESTIONS | WITH
ACTUAL SOLUTIONS!!
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、议论文、记叙文，还是其他类型？另外，作文的字数要求是多
•Discuss factors to be considered for the voyage planning - (answer)1)
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determine port departure/arrival and date
文、记叙文，还是其他类型？另外，作文的字数要求是多少呢？
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.

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•Know the 25 time zones - (answer)YXWVUTSRQPON-Z-ABCDEFGHIKLM

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•Determine time zones and make time zone conversions -
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(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)

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-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,
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from your closest METOC Center.
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•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.

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-Retained onboard for 1 year

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Position Report
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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



Advantages:

1. Cheap and easy to produce (scan existing paper chart)

2. Runs easily on PC

3. World-wide availability



Disadvantages

1.Zooming degrades quality