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Key Facts: GASM Yat Kaptanı (149 GT) Exam
149 GT
Maximum Vessel Gross Tonnage Under License
Gemiadamları ve Kılavuz Kaptanlar Yönetmeliği
4 modules
Official Examination Subject Papers
GASM Tablo-1 Curriculum
50 / 100
Minimum Passing Grade Per Subject
GASM Examination Directive
IALA A
Buoyage System in Turkish Territorial Waters
Denizcilik Genel Müdürlüğü
Ch 16 / Ch 67
Primary VHF Safety & Yachting Channels in Turkey
Kıyı Emniyeti Genel Müdürlüğü (Türk Radyo)
The Turkish GASM Yat Kaptanı (149 GT) certification authorizes skippers to command yachts up to 149 Gross Tonnage. The examination is delivered electronically by GASM across 4 modular papers: Seyir (Navigation), Gemicilik (Seamanship), Denizde Haberleşme (Communications), and Denizde Güvenlik (Safety), requiring 50% on each module to pass. This OpenExamPrep bank provides 100 high-yield practice questions in English covering coastal navigation calculations, twin-screw maneuvers, marine VHF/DSC, and lifesaving emergency procedures.
Sample GASM Yat Kaptanı (149 GT) Practice Questions
Try these sample questions to review concepts for the GASM Yat Kaptanı (149 GT) exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A yacht skipper lays off a True Course (TC) of 078° on a navigational chart. The local magnetic variation is 4° East and the vessel's deviation table indicates 2° West deviation on this heading. What Compass Course (CC) should the helmsman steer?
A.076°
B.080°
C.072°
D.084°
Explanation: To convert from True Course to Compass Course, subtract easterly variation and add westerly deviation (or apply Magnetic Course = True Course - Variation East = 078° - 4° = 074°; Compass Course = Magnetic Course - Deviation West = 074° - (-2°) = 076°). Thus, steering 076° on the steering compass achieves the required 078° True Course.
2A yacht departs Bodrum at 09:30 steaming towards Kos at a steady speed of 8.0 knots. If the passage distance is 12.0 nautical miles, at what time is the yacht estimated to arrive (ETA)?
A.10:45
B.11:00
C.11:15
D.10:30
Explanation: Travel time is calculated as Distance divided by Speed: 12.0 NM / 8.0 knots = 1.5 hours, which equals 1 hour and 30 minutes. Adding 1 hour and 30 minutes to departure time 09:30 gives an Estimated Time of Arrival (ETA) of 11:00.
3The helmsman is steering a Compass Course (CC) of 215°. The magnetic compass card exhibits a deviation of 3° East on this heading, and the local chart indicates a magnetic variation of 5° West. What is the vessel's True Course (TC)?
A.217°
B.223°
C.213°
D.207°
Explanation: Using the standard conversion sequence from Compass to True: Magnetic Course = Compass Course + Deviation East = 215° + 3° = 218°. True Course = Magnetic Course + Variation (taking West as negative) = 218° - 5° = 213°. Therefore, the True Course over the chart is 213°.
4Under the IALA Maritime Buoyage System Region A (used in Turkish coastal waters), what are the daytime characteristics of a port-hand lateral mark encountered when entering a harbor from seaward?
A.Green color, conical shape, with a single green cone pointing upward
B.Red and green horizontal bands with a single spherical topmark
C.Black and yellow horizontal bands with two cones pointing away from each other
D.Red color, cylindrical (can) shape, with a red cylindrical can topmark
Explanation: In IALA Region A (which covers Europe, Turkey, Africa, Australia, and most of Asia), port-hand lateral marks are red, can-shaped (cylindrical), and display a red can topmark. Starboard-hand marks are green and conical. In IALA Region B (the Americas, Japan, Korea, Philippines), the colors are reversed.
5A yacht master observes a cardinal buoy exhibiting very quick flashing white lights with 9 flashes every 10 seconds (VQ(9) 10s) and two black cone topmarks pointing toward each other at their points. On which side of this buoy must the yacht pass to navigate in safe water?
A.Pass to the West of the buoy
B.Pass to the East of the buoy
C.Pass to the North of the buoy
D.Pass to the South of the buoy
Explanation: A West Cardinal mark has topmark cones pointing point-to-point (resembling a wine glass or 'W' waist) and exhibits a quick or very quick white light flashing in groups of 9 (matching 9 o'clock on a clock face). Safe navigable water lies to the West of a West Cardinal buoy; the hazard lies to its East.
6What are the distinctive color and light rhythm characteristics of an IALA Isolated Danger Mark marking an offshore submerged rock?
A.Red and white vertical stripes, a single red spherical topmark, and an isophase or occulting white light
B.Black with one or more red horizontal bands, two black spherical topmarks, and a white flashing light with a group of 2 flashes (Fl(2))
C.Yellow with a black horizontal band, two black cones pointing downwards, and a very quick flashing white light
D.Solid yellow color, an X-shaped topmark, and a yellow flashing light
Explanation: An Isolated Danger Mark is erected on or moored over an isolated hazard that has navigable water all around it. It is painted black with one or more red horizontal bands, carries two black spheres as a vertical topmark, and shows a white light flashing in groups of two: Fl(2).
7What is the primary operational purpose of a Safe Water Mark under IALA guidelines?
A.To mark a newly discovered underwater obstruction that has not yet been surveyed on navigation charts
B.To designate recreation areas where motorized yacht navigation is strictly prohibited
C.To indicate that there is navigable water all around the mark, such as mid-channel or landfall approach points
D.To indicate the shallow edge of a dredged channel on the port hand
Explanation: Safe Water marks (displaying red and white vertical stripes and a single red sphere) indicate that there is navigable deep water all around the mark. They are commonly positioned to signify a fairway center line, mid-channel, or harbor approach landfall point.
8In Turkish coastal waters, yellow buoys carrying an 'X' shaped topmark and emitting a yellow flashing light are frequently encountered near bays. What do these marks designate?
A.Emergency wreck marking buoys identifying recently sunken vessels
B.Bifurcation marks indicating a secondary navigable channel
C.Isolated dangers with navigable deep water on all sides
D.Special marks denoting designated maritime areas such as fish farms, submarine cable zones, or spoil grounds
Explanation: Special Marks are yellow in color, feature a yellow 'X' topmark (St. Andrew's cross), and display yellow lights with any rhythm not used for white lights. They designate special areas or features referred to on nautical documents, such as aquaculture installations (fish farms), pipeline crossings, military exercise zones, or spoil grounds.
9A motor yacht with a static draft of 2.2 meters is navigating a shallow channel. The chart shows a soundings depth of 3.8 meters at Chart Datum. The tide table indicates the current height of tide is +0.7 meters above Chart Datum. Assuming zero squat, what is the vessel's Under-Keel Clearance (UKC)?
A.2.3 meters
B.1.6 meters
C.3.1 meters
D.0.9 meters
Explanation: Total depth of water is equal to Charted Depth plus Height of Tide: 3.8 m + 0.7 m = 4.5 meters. Under-Keel Clearance (UKC) is Total Depth minus Vessel Draft: 4.5 m - 2.2 m = 2.3 meters.
10A port has a Low Water (LW) height of 0.8 meters at 06:00 and High Water (HW) height of 3.2 meters at 12:00. Using the Rule of Twelfths, what is the estimated height of tide at 09:00 (3 hours after Low Water)?
A.1.6 meters
B.2.0 meters
C.2.4 meters
D.1.2 meters
Explanation: The tidal range is 3.2 m - 0.8 m = 2.4 meters. The flood duration is 6 hours. Under the Rule of Twelfths, tide rises: 1st hour = 1/12 of range (0.2 m), 2nd hour = 2/12 (0.4 m), 3rd hour = 3/12 (0.6 m). Over the first 3 hours, the total rise is 1/12 + 2/12 + 3/12 = 6/12 (half the total range), which is 1.2 meters. Adding this rise to Low Water height: 0.8 m + 1.2 m = 2.0 meters.
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