Editing Delta II (section)

== Naming system ==
The Delta II family used a four-digit system to generate its technical names:<ref>{{cite web |url=http://kevinforsyth.net/delta/vehicle.htm |title=Vehicle Description and Designations |last=Forsyth |first=Kevin S. |access-date=2008-03-15 |date=2007-08-10 |work=History of the Delta Launch Vehicle |archive-url=https://web.archive.org/web/20110808102239/http://kevinforsyth.net/delta/vehicle.htm |archive-date=2011-08-08 |url-status=live}}</ref>
* The '''first digit''' was either 6 or 7, denoting the 6000- or 7000-series Delta;
* The '''second digit''' indicated the number of boosters. Most Delta II rockets flew with 9 boosters, but some flew with 3 or 4;
* The '''third digit''' was always 2, denoting a second stage with an Aerojet AJ10 engine. Only Deltas prior to the 6000-series used a different engine, the [[TR-201]];
* The '''last digit''' denoted the third stage. 0 denoted no third stage, 5 indicated a [[Payload Assist Module]] (PAM) stage with Star 48B being used, and 6 indicated it used the Star 37FM motor for a [[Payload Assist Module|PAM]].
* An '''H''' following the four digits denoted that the vehicle used larger [[Delta III]] [[GEM 46]] boosters. The [[Delta IV Heavy|Heavy]] variant could be launched only from [[Cape Canaveral]] (as [[Vandenberg Space Force Base|Vandenberg]]'s pad wasn't modified to handle the larger SRBs) and was retired with the closure of that launch site in 2011;<ref name="nsfoco">{{cite web |last1=Graham |first1=William |title=ULA Delta II successfully lofts OCO-2 to orbit |url=http://www.nasaspaceflight.com/2014/07/delta-ii-oco-2-launch-vandenberg/ |website=NASASpaceflight.com |access-date=July 23, 2014 |date=July 2, 2014 |archive-url=https://web.archive.org/web/20140714130852/http://www.nasaspaceflight.com/2014/07/delta-ii-oco-2-launch-vandenberg/ |archive-date=July 14, 2014 |url-status=live}}</ref>
* Numbers and letters following those indicate the type of fairing. -9.5 means that the vehicle had a {{cvt|9.5|ft}} diameter fairing, -10 means an aluminum {{cvt|10|ft}} diameter fairing, -10C means a composite {{cvt|10|ft}} diameter fairing, and -10L indicates a lengthened {{cvt|10|ft}} diameter composite fairing. In some early Delta II flights, a fairing, about 8-feet in diameter (from older Delta rockets) was flown, and those vehicles had the -8 designation.

For example, a Delta 7925H-10L used the RS-27A, nine [[GEM 46]] boosters, a [[Payload Assist Module|PAM]] third stage, and a lengthened {{cvt|10|ft}} diameter fairing. A Delta 6320–9.5 is a two-stage vehicle with an RS-27 first-stage engine, three Castor 4A boosters, a {{cvt|9.5|ft}} diameter fairing, and no third stage.