RINA DOLPHIN QUIET-SHIP Notation

RINA's underwater-radiated-noise (URN) notation - aligned with IMO MEPC.1/Circ.906 and ABS UWN.

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{URN}_\text{measured} \leq \text{Limit}_\text{category}

Symbol	Meaning	Unit
$URN$	Underwater radiated noise	dB re 1 μPa at 1 m

Source: IMO MEPC.1/Circ.906 - URN guidelines; ISO 17208 - URN measurement

RINA's underwater-radiated-noise (URN) notation - aligned with IMO MEPC.