Nav
Vertical distance between the lowest point of a vessel’s keel and the seabed referenced to chart datum; the key safety margin preventing grounding.
Quick answer: Vertical distance between the lowest point of a vessel’s keel and the seabed referenced to chart datum; the key safety margin preventing grounding.
This term page is part of the Protermify Maritime glossary and is published as static HTML for fast indexing and clear language coverage.
Vertical distance between the lowest point of a vessel’s keel and the seabed referenced to chart datum; the key safety margin preventing grounding.
Garde sous quille 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.
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Questions and answers
In this glossary, Garde sous quille refers to: Vertical distance between the lowest point of a vessel’s keel and the seabed referenced to chart datum; the key safety margin preventing grounding.
In maritime communication, this term appears in contexts such as: "Contrôle du port à MV Aurora : votre garde sous quille est maintenant d’un virgule deux mètres au zéro hydrographique ; réduisez la vitesse afin de minimiser l’enfoncement et indiquez vos intentions."
Garde sous quille 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.
Garde sous quille is mainly used by Deck Officers, Engine Officers, and Masters.
In this glossary, Garde sous quille is grouped under Nav. Related pages in this category explain adjacent procedures, commands and operational concepts.
This definition is sourced from IMO SMCP, STCW Convention, SOLAS, COLREG and published by Protermify Maritime as a static maritime reference page.
Vertical distance between the lowest point of a vessel’s keel and the seabed referenced to chart datum; the key safety margin preventing grounding.
Harbour Control to MV Aurora, your underkeel clearance is now one decimal two metres at chart datum; adjust speed to minimise squat and confirm intentions.
Garde sous quille
Contrôle du port à MV Aurora : votre garde sous quille est maintenant d’un virgule deux mètres au zéro hydrographique ; réduisez la vitesse afin de minimiser l’enfoncement et indiquez vos intentions.
English reference definition
IMO SMCP, STCW Convention, SOLAS, COLREG
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