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E1D05

COMMISSION RULES · Amateur Space and Earth stations; telemetry and telecommand rules; identification of balloon transmissions; one-way communications

E1D05§ 97.213(d)E1D →

What must be posted at the location of a station being operated by telecommand on or within 50 kilometers of the Earth's surface?

  1. AA photocopy of the station license
  2. BA label with the name, address, and telephone number of the station licensee
  3. CA label with the name, address, and telephone number of the control operator
  4. DAll these choices are correct
Why Section 97.213 covers remotely controlled (telecommand) stations that are not space stations, meaning those on or within 50 km of the Earth's surface. Paragraph (d) requires that a photocopy of the station license plus a label giving the name, address, and telephone number of the station licensee, and the same information for the control operator, be posted conspicuously at the station location. The point is that anyone who finds an unattended transmitter, including an FCC inspector or a neighbor with interference, can immediately identify who is responsible and reach a human being.
Watch out Each single-item choice is true but incomplete; the rule calls for the license copy and contact information for both the licensee and the control operator, so only the combined answer satisfies it.
Unattended telecommand station: post the license copy plus who to call, both licensee and control op. 50 km is the dividing line.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
47 CFR 97.213(d) Telecommand of an amateur station.

An amateur station on or within 50 km of the Earth's surface may be under telecommand where:

(a) There is a radio or wireline control link between the control point and the station sufficient for the control operator to perform his/her duties. If radio, the control link must use an auxiliary station. A control link using a fiber optic cable or another telecommunication service is considered wireline.

(b) Provisions are incorporated to limit transmission by the station to a period of no more than 3 minutes in the event of malfunction in the control link.

(c) The station is protected against making, willfully or negligently, unauthorized transmissions.

(d) A photocopy of the station license and a label with the name, address, and telephone number of the station licensee and at least one designated control operator is posted in a conspicuous place at the station location.

eCFR text as of 1 Sep 2026 · read on ecfr.gov
← E1D04 All of E1D E1D06 →

The rest of E1D

  1. E1D01 What is the definition of telemetry?
  2. E1D02 Which of the following may transmit encrypted messages?
  3. E1D03 What is a space telecommand station?
  4. E1D04 Which of the following is required in the identification transmissions from a balloon-borne telemetry station?
  5. E1D05 What must be posted at the location of a station being operated by telecommand on or within 50 kilometers of …
  6. E1D06 What is the maximum permitted transmitter output power when operating a model craft by telecommand?
  7. E1D07 Which of the following HF amateur bands include allocations for space stations?
  8. E1D08 Which VHF amateur bands have frequencies authorized for space stations?
  9. E1D09 Which UHF amateur bands have frequencies authorized for space stations?
  10. E1D10 Which amateur stations are eligible to be telecommand stations of space stations, subject to the privileges o…
  11. E1D11 Which amateur stations are eligible to operate as Earth stations?
  12. E1D12 Which of the following amateur stations may transmit one-way communications?
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