NetJets has more than 300 planes constantly operating in the U.S.

This is a factual claim about NetJets as of early 2002: that its U.S. fleet (aircraft managed or operated in its fractional-ownership program) was more than 300 planes. True: Berkshire or NetJets records, or contemporary industry data from around end-2001 or early 2002, show more than 300 aircraft in NetJets' U.S. operations. Mostly true: the fleet was about 300 (roughly 285–300), or the 300+ figure is reached only by counting a small number of aircraft that were not strictly U.S.-based. Mostly false: the fleet was clearly below that, roughly 220–285, or the 300+ figure holds only by adding European or aircraft on order. False: the U.S. fleet was well below 300, under about 220. 'Constantly on the go' is not tested literally: it describes aircraft in active service.

Set before the research began.

1. E1 Securing the Skies: Private Flight Who’s Who Robb Report · 1 January 2002

   “Formed by Executive Jet in 1986, it is the oldest and largest fractional ownership program, with more than 345 aircraft (15 models from five manufacturers) in the air, many of which are available internationally.”

2. E2 Travel Trend Lifts Van Nuys Firm Los Angeles Times · 21 March 2002

   “promising time-share owners custom jet service on one hour’s notice with any of its 350 planes.”

3. E3 NetJets: expansionist but query over profitability Aviation Strategy · June 2003

   “Out of a fleet of over 400, NetJets operates 36 aircraft in Europe (with an average age of 1.9 years) and this fleet is scheduled to grow by 50% in the next 18 months.”

4. E4 Aircraft: Best of the Best Flight Services: NetJets Robb Report · 1 June 2002

   “By the end of this year, NetJets will manage and operate 550 jets and 13 choices of aircraft.”

E1 and E2 give total NetJets fleet figures of about 345–350 aircraft in early 2002, and E3 reports 36 European aircraft in mid-2003. None of the evidence gives a U.S.-only count for early 2002, so it cannot show whether the U.S. fleet was above 300 or about 300, which is the line the criteria draw between true and mostly true.