47 CFR § 80.753 - Signal strength requirements at the service area contour.

---
identifier: "/us/cfr/t47/s80.753"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 80.753 - Signal strength requirements at the service area contour."
title_number: 47
title_name: "Telecommunication"
section_number: "80.753"
section_name: "Signal strength requirements at the service area contour."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "D"
subchapter_name: "SAFETY AND SPECIAL RADIO SERVICES"
part_number: "80"
part_name: "STATIONS IN THE MARITIME SERVICES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377."
regulatory_source: "51 FR 31213, Sept. 2, 1986, unless otherwise noted."
cfr_part: "80"
---


# 80.753 Signal strength requirements at the service area contour.

(a) The requirements for reception by a marine VHF shipboard receiver are satisfied if the field strength from the coast station, calculated in accordance with § 80.771 is at least + 17 dBu above one microvolt.

(b) These field strengths, voltages and powers at the receiver input are equivalent:

(1) −132 dBW (decibels referred to 1 watt).

(2) 1.8 microvolts across 50 ohms.

(3) + 17 dBu (decibels referred to 1 microvolt per meter).

(4) 7 microvolts per meter.