Vintage 1st Substitute Maritime Signal Flag and similar items

Vintage 1st Substitute Maritime Signal Flag - good condition! ***Please visit our store for more vintage newer nautical Maritime flags*** Approximate Measurements: 88 1/2? L X 47?W Please see all pics! No holes or tears. Some light ?staining? is present that could be cleaned with appropriate cleaners if desired. We have not attempted to clean this flag. Shadows glares are seen in pics from lighting. The 1st substitute flag in nautical signaling, also known as the first repeater, signifies that the flag immediately above it in the sequence is being repeated. It's used when a flag needs to be displayed multiple times in a sequence, but the ship only has one set of flags. The 1st substitute indicates the first flag in the hoist is being repeated. Additionally, in a naval context, it can also signify the absence of a flag officer or unit commander when in port, according to Flagdom. Here's a more detailed explanation: Substitute/Repeater Flags: In the International Code of Signals, substitute flags allow for the repetition of flags within a signal without needing multiple sets of flags, according to Wikipedia. 1st Substitute: This specific pennant is used to indicate that the first flag in the signal sequence should be read again. Example: If a ship wants to signal "AAA", it would use the "A" flag, followed by the 1st substitute flag, and then another "A" flag. Naval Context: In addition to its substitution function, the 1st substitute flag also has a specific naval meaning. When flown by a naval vessel in port, it indicates the absence of a flag officer or unit commander. Thanks for looking and have a great day!