F1 - 1460101 Determine position and the accuracy of resultant fix by any means

C-4

Gacrux

Which navigational star in the southern hemisphere can be found in the constellation Crux?

Index mirror

The part of a sextant mounted directly over the pivot of the index arm is the ______.

V-shaped ripple with the point of the V pointing downstream

A condition where two currents meet at a down stream end of a middle bar can be determined by a ____________.

Silvered on its half nearer the frame

The horizon glass of a sextant is _______.

Positive correction

A sextant having an index error that is off the arc has a _______,

Negative correction

A sextant having an index error that is ON the arc has a ____________.

Tidal Current Tables

What is the publication to determine time and duration of slack water>

Wait for next high water

Your ship is aground with sandy bottom. What do you do if there is vacuum between seabed and hull?

Part D

What part of COLREGS is sound and light signals?

It is 1200, 6 July

On 5 July, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?

It is 1000, 7 July

On 6 July, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?

50%

Ice concentration is measured in OKTA’s. What percentage of the sea surface is ice covered with 4 OKTA’s concentration?

0.5

what percentage of the sea surface is ice covered if the report say four (4) OKTA concentration?

300%

When using GPS, how many theoretical position lines are required for a two-dimensional fix?

Recommend an alternative action and if not followed relieve the Pilot

A vessel is entering port and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do?

To improve safety

What is the objective of a Vessel Traffic System Operations?

13.5 nm

The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. if the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?

Unless there are compelling reasons

A ship shall use a mandatory routing system adopted by the organization. in what is a situation where a vessel is not obliged to use it?

It is called the Line of equinoxes

How would you classify the line connecting vernal equinox to autumnal equinox?

150 meters

What is the minimum range of lights for a vessel not under command?

Accumulated rate

How would you classify the total amount of time which the chronometer has last gauge?

A falling out of the traffic lane will indicate a cross track deviation

How would you describe a cross track distance being maintained while transiting a congested water where available sea room is less?

A triangular topmark is composed of buoys marking the channels starboard side from seaward while a cardinal topmark is marking the point of interest

How would you distinguish between a triangular topmark and a cardinal topmark?

An area with defined limits which should be avoided by all ships

How would you interpret an area to be avoided? It is a routeing measure comprising an area within defined limits in which either navigation is particularly hazardous or it is exceptionally important to avoid casualties and which should be avoided by all ships or certain classes of ships.

A v-shaped ripple observed pointing downstream

How would you know a condition where two currents meet a downstream end in the middle of the bar?

Along the established direction of traffic flow

How would you lay out a course line that indicates the directional flow of ship in a traffic separation scheme?

A beaming line draw parallel to the original course with a known and fixed perpendicular distance between both the line is used as reference

How would you maintain and follow a charted course while transiting a congested coastal waters?

A prudent selection of fixed object along the channel

How would you show that parallel indexing is reliable while transiting a narrow channel?

After the contact has been marked at least twice

The closest point of approach (CPA) of a contact on a relative motion radar may be determined ______________.

29 deg 10.7°

The height of the observer eye is 14.0 meters; Dip 6.6’ and refraction 1.7. The observer of the true altitude of star Dubhe if the index error is 2.9’ off the arc?

A vessel under 20 meters in length

Under COLREGS Rule 10, who shall not impede the safe passage of a power driven vessel following a traffic lane?

7-8 tenths

What concentration range of ice corresponds to a close pack?

31°10.6

What is the true latitude of star Pollux if the observed sextant altitude was 31dec 17.2’; index en, with the following apparent corrections; dip 6.8’ and refraction 1.6"?

A vessel using an inshore traffic zone

Which of the following vessel is categorized as NOT using a traffic separation scheme in the content of Rule 10 of the International Regulation for Preventing Collision at Sea?

Advection fog

Which type of fog is the most dense and widely spread of those that occur on the Great Lakes?

336 deg. 53 mins 00 secs

You are navigating on a course of 343 degrees True. A light buoy bearing course would you steer to pass 3 miles abeam of the light buoy leaving

Geoidal horizon

What do you call the imaginary plane parallel to the sensible horizon passing through a point on the surface of the ocean?

The depth indicated is about 824 fathoms

What water depth is indicated by sound signal from a fathometer oscillator?

824 fathoms

If a sound signal is emitted from the oscillator of a fathometer, and two seconds elapse before the returning signal is picked up, what depth of water is indicated?