All 431 questions from NBTC's official bank for the General Operator's Certificate — five subject areas, from system overview through to Inmarsat and MF/HF. Free, no sign-up.
Work through all 431 questions. Stop anytime — your progress is saved.
50 random questions, 60 minutes. Just like the real exam.
The General Operator's Certificate is the unrestricted GMDSS qualification: it covers every sea area, A1 through A4, and therefore the satellite and long-range equipment that goes with them — Inmarsat terminals, MF/HF DSC, NBDP/SITOR. Deck officers on vessels trading beyond coastal waters hold it. If your vessel never leaves VHF coverage of a coast station, the ROC is the certificate you need instead.
Set out in ภาคผนวก จ of the NBTC notification: (1) general information, system overview and principles of communication; (2) FCC rules and regulations, DSC and alpha-numeric identities; (3) distress, urgency and safety traffic, survival craft equipment and SAR; (4) VHF-DSC equipment and Maritime Safety Information; (5) Inmarsat equipment and MF/HF equipment and communications. The fifth is by far the largest — 42 of the 100 syllabus topics and 150 of our 431 questions.
Clause 19(1) of the notification requires at least 60% in every subject area, assessed separately. A strong overall average will not carry a weak subject — this is why practising by subject matters more here than practising at random, and why the fifth area deserves the most time.
No, and we would rather say so plainly. The notification fixes the 60%-per-subject threshold but publishes neither a question count nor a time limit. Fifty is the size of one draw in NBTC's own E-Practice system; sixty minutes is a working pace we chose. Treat the pass mark as official and the rest as a rehearsal setting.
From ข้อสอบกลาง — the central examination bank สำนักงาน กสทช. publishes openly through its E-Practice system at oss.nbtc.go.th. Question text, all four options and the answer key are reproduced exactly; we neither rewrite nor translate them. The examination itself is sat at an NBTC-approved training station, and GoExam has no connection to that process.
12 sample questions from a bank of 431.
1. What is the basic concept of GMDSS?
Source: NBTC E-Practice GOC หมวด 1 · etid 1681
2. GMDSS is primarily a system based on:
Source: NBTC E-Practice GOC หมวด 1 · etid 1682
3. What is the responsibility of compulsory GMDSS vessels?
Source: NBTC E-Practice GOC หมวด 1 · etid 1683
4. GMDSS is required for which of the following?
Source: NBTC E-Practice GOC หมวด 1 · etid 1684
5. What equipment is used in or near the survival craft?
Source: NBTC E-Practice GOC หมวด 1 · etid 1687
6. What equipment is programmed to initiate transmission of Distress alerts and calls to individual stations?
Source: NBTC E-Practice GOC หมวด 1 · etid 1688
7. What system provides accurate vessel position information to the GMDSS equipment?
Source: NBTC E-Practice GOC หมวด 1 · etid 1689
8. Which of these can be used to receive MSI?
Source: NBTC E-Practice GOC หมวด 1 · etid 1690
9. If a vessel is engaged in local trade and at no point in its voyage travels outside the range of a VHF shore station with continuous DSC alerting then the vessel is operating in what area?
Source: NBTC E-Practice GOC หมวด 1 · etid 1693
10. What is defined as an area, excluding sea areas A1 and A2, within the coverage of an Inmarsat geostationary satellite in which continuous alerting is available?
Source: NBTC E-Practice GOC หมวด 1 · etid 1694
11. SITOR (NBDP) equipment is a partial or alternate carriage requirement under GMDSS for vessels operating in which sea area(s)?
Source: NBTC E-Practice GOC หมวด 1 · etid 1695
12. What is defined as the area within the radiotelephone coverage area of at least one VHF coast station in which continuous DSC alerting is available as defined by the IMO regulation for GMDSS?
Source: NBTC E-Practice GOC หมวด 1 · etid 1696
Questions and answer keys are the central examination bank (ข้อสอบกลาง) of สำนักงาน กสทช. (NBTC), Thailand, published openly in its E-Practice system. The five subject areas and the 60%-per-subject pass mark are from ภาคผนวก จ and clause 19(1) of the NBTC notification published in the Royal Gazette (ราชกิจจานุเบกษา เล่ม ๑๓๕ ตอนพิเศษ ๒๔๖ ง, 3 October 2018). Reproduced unchanged. GoExam is an independent practice site, not affiliated with NBTC. NBTC E-Practice (official source)
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