Coxswain Study

Question 0

Isolated Danger Bouy

Answer 0

South Khor Bouy
Black and Red
Day Shape Two Black Balls
Night light 2 flashes every 10 sec

Question 1

Safe Water Bouys

Answer 1

Red and White
North Khor - 1 flash every 10 secs
MS Approach - 4 secs on 4 off

Question 2

Day Markers

Answer 2

Triad (red)

Diwan (green) - inner/outer harbor marker

Question 3

Cardinal Bouys

Answer 3

Seistan’s Wreck - Black/Yellow, North, day shape two apex’s pointing up, night constant flash

Bouy 10 - Black/Yellow/Black, East, day shape two apex’s pointing away from each other. 3 flashes every 5 seconds

Sitra Beacon - Yellow/Black, South two apex’s pointing pointing down, 6 very quick flashes 1 long every 15 secs (HVA) Pick up

Buoy 37 - (same as Sitra) Capitol Asset pick up

Question 4

Capitol Assets

Answer 4

CV, CVN, SSN, 5th Fleet Ambassador and anything designated by 5th fleet.

Question 5

Zones

Answer 5

React Zone - 150 yards from pier
Warning Zone - 150-300 yards
Assessment Zone - 300 yards

Question 6

8 unrestricted vessels

Answer 6

1. Svitzer Muharrq Tugs
2. Bahrain Defense Force (BDF)
3. Bahrain Coast Guard (BCG)
4. US and Allied Vessels
5. Meanus (Buoy tenders)
6. Kings Pleasure Craft (Black Pearl)
7. Bahrain Warships / LCU’s
8. Pilot Boat

Question 7

Main Channel Buoys

Answer 7

11, 14, 9, 12, 3, 10, 1, 2 2a

Question 8

Alternate Channel Buoys

Answer 8

8, 7, 6, 5, 10, 4

Question 9

Shapes of Buoys

Answer 9

Can
Nun
Spherical
Pillar
Spar

Question 10

Buoy categories

Answer 10

Lateral marks
Cardinal marks
Isolated danger marks
Safe water marks
Special marks

Question 11

Notice to Mariners

Answer 11

Updates charts and pubs for navigation and warning messages

Updated weekly

Question 12

Currents

Answer 12

Flood - water flows from ocean into harbor (high tide)

Ebb - water flows from harbor to ocean (low tide)

Slack - no motion of water in harbor or estuary between change or current from flood and ebb

Question 13

North

Answer 13

Magnetic North uses Magnetic North Pole for reference

True North uses true or geographical north as reference

Question 14

GPS

Answer 14

FOM (Failure of Merit) internal GPS receiver calculation that indicates the best accuracy achievable from satellites being tracked

Issues that affect FOM
Signal tracked
# of freq's
Receiver noise
Time errors

Question 15

ORM

Answer 15

Identify Hazards
Assess Hazard
Make Risk Decision
Implement Controls 
Supervise

Question 16

Risk Assessment Codes

Answer 16

Critical
Serious
Moderate 
Minor
Negligible

Question 17

Anchor parts

Answer 17

Shackle
Eye
Shank
Fluke
Stock
Crown

Question 18

Radio Channels

Answer 18

6 - Aircraft
9 - Alt channel for non-commercial vessel
12 - Port Ops
13 - Bridge to bridge
16 - Distress

14 - HPU Bahrain Security
72/74 - Hailing for ships at sea
83a - Alt channel
LOS4 - Secure channel

Question 19

Storm Warnings

Answer 19

Small Craft - winds 15-33 knots, lights signal red over white, 1 red pennant

Gale Warning - winds 34-47 knots, light signal white over red, 2 red pennants

Storm Warning - winds 48-63 knots, light signal red over red, 1 red flag with black square

Hurricane Warning - winds 64+ knots, light signal red over white over red, 2 red flags with black square

Question 20

CBDR

Answer 20

Constant Bearing Decreasing Range - indicates collision

Question 21

Define Vessel

Answer 21

Every description of water craft including non displacement craft and sea planes used to transport people or cargo across the water

Question 22

Overtaking

Answer 22

22.5 degrees abaft her beam (running light visible)

PESO- Port even (2 short blasts) Starboard odd (1 shot blast)

Question 23

Ships lights

Answer 23

Mast - white light 225 degrees towards bow

Running lights - Port red Starboard green 112.5 degrees

Stern - white light 135 degrees