Termify logo Protermify Maritime Maritime English glossary for maritime professionals and learners.

Nav

パラレルインデックスライン

A radar-derived reference line drawn parallel to the vessel's intended track, used to monitor cross-track error by keeping a chosen land echo or seamark at a constant offset.

Quick answer: A radar-derived reference line drawn parallel to the vessel's intended track, used to monitor cross-track error by keeping a chosen land echo or seamark at a constant offset.

This term page is part of the Protermify Maritime glossary and is published as static HTML for fast indexing and clear language coverage.

Languages

ArabicDeutschEnglishEspanolFrancaisHindiBahasa IndonesiaItalianoJapanesePortuguesRusskiyThaiTurkceVietnameseZhongwen

Quick answer

A radar-derived reference line drawn parallel to the vessel's intended track, used to monitor cross-track error by keeping a chosen land echo or seamark at a constant offset.

Why it matters

パラレルインデックスライン matters because it supports clear communication in Nav contexts for Deck Officers, Engine Officers, and Masters. It also connects to aviation training and exam language such as STCW, Marlins Test, ISF Watchkeeper, and GMDSS.

Editorial context

This page is rendered as static HTML from source-backed terminology data so search engines and AI systems can parse the content without client-side code.

Questions and answers

Questions and answers

What is パラレルインデックスライン?

In this glossary, パラレルインデックスライン refers to: A radar-derived reference line drawn parallel to the vessel's intended track, used to monitor cross-track error by keeping a chosen land echo or seamark at a constant offset.

How is パラレルインデックスライン used in maritime?

In maritime communication, this term appears in contexts such as: "水先案内人: 右舷側パラレルインデックスラインを 20m 等深線から 1 ケーブル外側に保ち、ズレ一定に舵で補正せよ。"

Why does パラレルインデックスライン matter in maritime?

パラレルインデックスライン matters because it supports clear communication in Nav contexts for Deck Officers, Engine Officers, and Masters. It also connects to aviation training and exam language such as STCW, Marlins Test, ISF Watchkeeper, and GMDSS.

Who uses パラレルインデックスライン?

パラレルインデックスライン is mainly used by Deck Officers, Engine Officers, and Masters.

What category does パラレルインデックスライン belong to?

In this glossary, パラレルインデックスライン is grouped under Nav. Related pages in this category explain adjacent procedures, commands and operational concepts.

Where does this definition come from?

This definition is sourced from IMO SMCP, STCW Convention, SOLAS, COLREG and published by Protermify Maritime as a static maritime reference page.

Definition

A radar-derived reference line drawn parallel to the vessel's intended track, used to monitor cross-track error by keeping a chosen land echo or seamark at a constant offset.

Operational example

Pilot: Keep the starboard parallel index line one cable off the 20-metre contour; adjust rudder as necessary to maintain constant offset.

Localized term

パラレルインデックスライン

Localized example

水先案内人: 右舷側パラレルインデックスラインを 20m 等深線から 1 ケーブル外側に保ち、ズレ一定に舵で補正せよ。

Definition language

English reference definition

Source

IMO SMCP, STCW Convention, SOLAS, COLREG

Category

Nav

Exam relevance

  • STCW
  • Marlins Test
  • ISF Watchkeeper
  • GMDSS

Target audience

  • Deck Officers
  • Engine Officers
  • Masters

Related terms

Use the related links below to continue through connected maritime terminology.

Back to glossary

Termify Get Termify on the App Store OPEN
AI Free AI Search Source-backed aviation answers