<div class="description">
<ul><li><b>Scope and content:</b>  Original Caption: Arrow indicator used to direct course in convoying transport.  The arrow indicator was used successfully during the convoying of troop ships, in directing course for other convoy ships.  The indicator at night is illuminated and works on gears and the leader of the convoy places the arrow at certain degrees which signify the convoy to keep a narrower or wider space between transports.</li></ul>
Photographer: Keystone View Co.</div>
<div class="fn value">
Unknown author<span style="display: none;">Unknown author</span> or not provided</div>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>