IEC 61162

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IEC 61162 is a collection of IEC standards for "Digital interfaces for navigational equipment within a ship".

The 61162 standards are developed in Working Group 6 (WG6) of Technical Committee 80 (TC80) of the IEC.

Sections of IEC 61162[edit]

Standard IEC 61162 is divided into four parts:

  • Part 1: Single talker and multiple listeners
  • Part 2: Single talker and multiple listeners, high-speed transmission
  • Part 3: Serial data instrument network (Also known as NMEA 2000)
  • Part 4: Multiple talkers Multiple listeners (Also known as Lightweight Ethernet)

The 61162 standards are all concerning the transport of NMEA sentences, but the IEC does not define any of these. This is left to the NMEA Organization.

IEC 61162-1[edit]

Single talker and multiple listeners

IEC 61162-2[edit]

Single talker and multiple listeners, high-speed transmission

IEC 61162-3[edit]

Serial data instrument network

IEC 61162-4[edit]

Multiple talkers Multiple listeners

This subgroup of TC80/WG6 has specified the use of Ethernet for shipboard navigational networks. The specification describes the transport of NMEA sentences as defined in 61162-1 over IPv4. Due to the low amount of protocol complexity it has been nicknamed Lightweight Ethernet or LWE in short.

The historical background and justification for LWE was presented at the ISIS2011 symposium.[1] An overview article of LWE was given in the December issue of "Digital Ship" [2]


  1. ^ Ø.J. Rødseth, et al. "Overview of the IEC 61162-450 “Light Weight Ethernet” Ship Bridge Data Network", ISIS2011
  2. ^ M.J. Christensen, et al. Lightweight Ethernet - a new standard for shipbord networks" [1]

External links[edit]