Naval Aircraft Factory PN
...that Naval Aircraft Factory PN flying boats were a series of US patrol aircraft in the 1920s and 1930s?
...that <b id="mwEMw"><a href="./Naval_Aircraft_Factory_PN" id="mwEM0" rel="mw:WikiLink" title="Naval Aircraft Factory PN">Naval Aircraft Factory PN</a></b> <a href="./Flying_boat" id="mwEM4" rel="mw:WikiLink" title="Flying boat">flying boats</a> were a series of <a href="./United_States" id="mwEM8" rel="mw:WikiLink" title="United States">US</a> patrol aircraft in the 1920s and 1930s?