What would the number 1090 indicate?

What would the number 1090 indicate?

Question 1 of 27070hdQlYfwajs3HWdbDZY53

What would the number 1090 indicate?

Question 1 of 27070

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What would the number 1090 indicate?

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🔍 Key Concepts

• MMSI numbering format for ship vs. coast station digital selective calling (DSC) identities • How SELCAL numbers for SITOR/NBDP are structured (typically short numeric codes, not full MMSI) • Differences between ship and coast station identifiers in both MMSI and SITOR systems

💭 Think About

• Ask yourself: Does a valid MMSI (Maritime Mobile Service Identity) normally have three, four, or nine digits? How many digits are in 1090? • Consider whether a short 3–4 digit number is more typical of a selective calling (SELCAL) code or a full MMSI assignment. • Think about which type of station (ship or coast) is more often assigned short SELCAL codes in NBDP/SITOR operations.

✅ Before You Answer

• Verify the standard length and leading digits of MMSI numbers for ships and coast stations in GMDSS references. • Check how many digits are normally used for SITOR (NBDP) SELCAL numbers and whether they can be as short as "1090". • Confirm whether ship stations or coast stations commonly use short SELCAL numbers like this in SITOR/NBDP.