Marine signal flag: Letter "S" (Sierra) Size:3' x 3' PPI Policies

PPI Policies

NOAA Nautical Chart 11480: Charleston Light to Cape Canaveral is a standard navigation chart used by commercial and recreational mariners alike

Third generation GPS chart featuring colour graduated depth contours

Indispensable Strait is a standard nautical chart

Australia – North Coast and Adjacent Waters is a standard nautical chart

Marine signal flag: Letter "S" (Sierra) Size:3' x 3' PPI PoliciesInternational maritime signal message: "I am moving astern" Marine signal flags are international signals used by ships at sea to spell out short messages, or more commonly, used individually or in combination they have special meanings.