You must evacuate crewmembers from a space filling with smoke. The primary means of escape is blocked by the fire. What fire control plan symbol, in illustration D039SA below, designates the secondary means of escape?
• Look closely at the green arrows and the red escape symbol in the lower-right corner of the diagram (symbols 61, 62, and 63). • On fire control/escape plans, a solid arrow and a dashed arrow usually do not mean the same thing; one is typically the primary route and the other an alternate/secondary route. • Consider what a simple exit marker symbol would look like compared to a directional route symbol.
• Which of the listed symbols looks like it is giving you a direction along a path rather than simply marking the location of an exit? • If the primary route is blocked, what kind of marking would you expect for a backup path—a completely different shape, or a variation of the main arrow symbol? • Among the choices, which symbol most clearly suggests a secondary or alternative route rather than the main one?
• Make sure you can distinguish between route arrows (showing direction of travel) and exit location symbols (showing a doorway or point). • Compare symbols 61, 62, and 63 side by side and decide which one is most logically used to show a secondary escape route rather than a primary route or just an exit point. • Verify that the symbol you pick is consistent with how primary vs. secondary escape routes are usually differentiated (for example, solid vs. broken line).
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