Wynn’s Official History (0117727784),1994,P.441 has May,1967 BS launches at 35-47 miles, impact errors 515/640/1,065yds. He never states that CA Release in dispersed QRA was unrestricted; if not, JN’s comment (undeclared first use policy) would have been true.

JN’s opening Q was how good were inertial guidance standoff weapons. See AGM-28 Hound Dog, AGM-69A SRAM, AGM-86B ALCM, but they had turbojet/solid rocket/turbofan. We funded Blue Steel in 1954, despairing to fill the Blue Boar task of 1946. Kearfott gyros had been accessed by MoS/Sandys, MoS had started stainless steel work (to be T.188), RPE’s liquid motor expertise (all those Screamer boosters) infused ASM Stentor: so 1960 deployment seemed poss. Solid fuel would be for a long-legged substitute, c.1965. It went so wrong from your choice from: new-hire team, many ex-RAE, not Avro-Aero-origin; MoS (non-)co-ordination of (not yet recognised as) Weapon System; debilitating effect of a sense of a short-run project, so low priority, despite the implications of our own SAM work.