Under the IALA cardinal system, what does a mark with a quick white light showing 6 flashes followed by one long flash indicate in relation to the location of the safest water?
• IALA cardinal marks and how they indicate the direction of safe water (N, E, S, W) • The flash patterns for quick or very quick white lights on cardinal marks • The memory aid that links the number of flashes to positions on a clock face (3, 6, 9)
• Which cardinal mark uses a pattern of 6 short (quick) flashes followed by 1 long flash, and what compass direction does that cardinal mark represent? • How do the different flash groups (continuous, 3, 6+1 long, 9) correspond to north, east, south, and west on a compass rose? • Can you recall the common mnemonic that connects the numbers 3, 6, and 9 with east, south, and west around a clock? Where would 6 be located?
• Confirm which cardinal mark’s light characteristic is Q(6)+LFl or VQ(6)+LFl (6 quick/very quick flashes plus 1 long). • Verify that you are matching the correct direction (N/E/S/W) to the flash group, not to the buoy color or topmark shape alone. • Double‑check that you know whether the safe water lies in the named direction from the mark (e.g., safe water to the north of a north cardinal).
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