Which marine advisory corresponds to winds of 18-33 knots?

• A. Gale - 34-47 KTS White over Red - Two Red Pennants
• B. Hurricane - 64 KTS or greater - Red White Red = Two square red flags with black centers
• C. Storm - 48-63 KTS - Two Red lights - Square red flag with black center
• D. SCA - 18-33 KTS Red over White - Red Pennant

Answer: (D)

Winds in the 18–33 knot range are classified as a Small Craft Advisory. This advisory is issued to warn mariners of small craft that winds and seas may be hazardous for safe operation, even if larger vessels can handle the conditions. The signaling for this advisory is a red over white flag with a red pennant, which uniquely identifies this wind range.

The other wind ranges correspond to stronger conditions and different signals: 34–47 knots is a Gale (white over red with two red pennants), 48–63 knots is a Storm (two red lights or a square red flag with a black center), and 64 knots or greater is a Hurricane (red-white-red pattern or two square red flags with black centers).