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SKT pm'd me to point out a couple of errors in what I mentioned above and, of course, he's quite right. So I thought I'd just make a short (for me) post to correct that.
The more recent history of Canadian air defence is as follows:
1) 4 AD Regt was formed during the 1987/88 reorganization under the Billion dollar Low Level Air Defence project whereby U AD Bty of 3 RCHA, V AD Bty of 5 RALC, and the Blowpipe troops from 1 and 2 RCHA were all stood down. 128 and 129 Airfield AD Btys in Lahr came under command of 4 AD as did a new battery 127 AD Bty. 119 AD Bty in Chatham and 4 AD Bty with the AD School in Gagetown remained in operation. The systems in use were the new ADATS, Skyguard, and the old Blowpipe. The old 40mm Boffins were divested;
2) In 1991/92 things reorganized again with the closure of 4 CMBG. At that time U, Y and V AD Btys were briefly stood back up in 1 RCHA (now in Shilo) and 2 RCHA and 5 RALC and then almost immediately stood down again and personnel redistributed as 1 AD Regt in Pembroke (with 89 AD Bty and 109 AD Bty), 18 AD Regt in Lethbridge (with 20th AD Bty and 39th AD Bty) and 58 BAA in Lévis were stood up with Javelin (which replaced Blowpipe in 1991) and authorized as Total Force units to take over the AD support to the three Reg F brigades (after their formation some courses would also be run for reservists on Skyguard and ADATS which remained with 119 AD Bty and 4 AD Bty);
3) Also in 1992 as 4 CMBG stood down, 4 AD Regt was reduced to nil strength but 119 AD Bty in Chatham and 4 AD Bty with the AD School remained;
4) In 1994 reactivation of 4 AD Regt was authorized as total force unit for stand up in 1996;
5) In 1996 4 AD Regt's HQ and 128 AD Bty were located in Moncton. 119 AD Bty merged into 4 AD Regt and it together with 210 Workshop were now located in Gagetown. 4 AD Bty and the AD School were absorbed into the Arty School. 1 AD Regt, 18 AD Regt and 58 BAA were now tasked to augment 4 AD Regt with a total of five Javelin troops and three ASCCs;
6) During the massive 2006 reorganization (where regular force FSCCs became larger, more FOO dets were authorized, three STA batteries were stood up and gun detachments were reduced from 54 to 24 thus requiring more Res F gun dets as augmentees) all Res F AD units converted back to field units - completed in 2007. Skyguard and Javelin went out of service in 2005. The ASCCs remained with 4 AD Regt which also starts focusing their training for a while as more of a Direct Fire Support unit with ADATS;
7) 2013 last year for 4 AD Regt - renamed and restructured to 4 Regt RCA (GS) (with 119 Bty, 127 Bty, and 128 Bty) - All remaining ADAT assets gone. 4 Regt (GS) currently provides ASCC, above brigade level FSCC and STACC, Medium Range Radars which are the ELM-2084 Multi-Mission Radar and CU172 Blackjack unmanned aerial systems.
So the correction is that the Total Force AD units (1 AD Regt, 18 AD Regt and 58 BAA) did not support 4CMBG but were in fact formed as 4 CMBG and 4 AD Regt were disbanded and were initially employed directly supporting the three Mechanized Brigade groups in Canada until tasked to augment 4 AD with five troops when if was reformed.
Sorry about that - mea culpa. The trouble is I knew all this and wrote a section in the book about it about four months ago. Mixed some apples with oranges here - temporary brain fart I guess.
The shut down of Total Force air defence was not because of cost of the reserve component. The shut down was for two major reasons: first, the five Res F troops were exclusively Javelin and for the sole purpose of augmenting 4 AD regiment which was in 4 CMBG at the time. When 4 CMBG shut down there was no longer a pressing need for the five Res F troops; and secondly, there was a need to "refresh" the Javelin stock which was expensive so the Javelin was shut down in favour of just keeping the ADATS which did not have a Res F component to it. Eventually when the ADATS was shut down it was for the cost of "refreshing' the system - MMEV hadn't panned out and the that project was shut down leaving ADATS limping along. Eventually with the changes to a strong STA component and the UAVs, the only thing left to cut ADATS. The biggest issues whenever it comes to capabilities is a) what priority do the PYs have in the bigger scheme of things and b) what cost is there to maintain training and a war stocks of ammunition through the equipment's life cycle. The weapon system itself is often the least expensive element in the equation.
Res F personnel costs are the least pricy component money wise but do add a readiness risk element.
The more recent history of Canadian air defence is as follows:
1) 4 AD Regt was formed during the 1987/88 reorganization under the Billion dollar Low Level Air Defence project whereby U AD Bty of 3 RCHA, V AD Bty of 5 RALC, and the Blowpipe troops from 1 and 2 RCHA were all stood down. 128 and 129 Airfield AD Btys in Lahr came under command of 4 AD as did a new battery 127 AD Bty. 119 AD Bty in Chatham and 4 AD Bty with the AD School in Gagetown remained in operation. The systems in use were the new ADATS, Skyguard, and the old Blowpipe. The old 40mm Boffins were divested;
2) In 1991/92 things reorganized again with the closure of 4 CMBG. At that time U, Y and V AD Btys were briefly stood back up in 1 RCHA (now in Shilo) and 2 RCHA and 5 RALC and then almost immediately stood down again and personnel redistributed as 1 AD Regt in Pembroke (with 89 AD Bty and 109 AD Bty), 18 AD Regt in Lethbridge (with 20th AD Bty and 39th AD Bty) and 58 BAA in Lévis were stood up with Javelin (which replaced Blowpipe in 1991) and authorized as Total Force units to take over the AD support to the three Reg F brigades (after their formation some courses would also be run for reservists on Skyguard and ADATS which remained with 119 AD Bty and 4 AD Bty);
3) Also in 1992 as 4 CMBG stood down, 4 AD Regt was reduced to nil strength but 119 AD Bty in Chatham and 4 AD Bty with the AD School remained;
4) In 1994 reactivation of 4 AD Regt was authorized as total force unit for stand up in 1996;
5) In 1996 4 AD Regt's HQ and 128 AD Bty were located in Moncton. 119 AD Bty merged into 4 AD Regt and it together with 210 Workshop were now located in Gagetown. 4 AD Bty and the AD School were absorbed into the Arty School. 1 AD Regt, 18 AD Regt and 58 BAA were now tasked to augment 4 AD Regt with a total of five Javelin troops and three ASCCs;
6) During the massive 2006 reorganization (where regular force FSCCs became larger, more FOO dets were authorized, three STA batteries were stood up and gun detachments were reduced from 54 to 24 thus requiring more Res F gun dets as augmentees) all Res F AD units converted back to field units - completed in 2007. Skyguard and Javelin went out of service in 2005. The ASCCs remained with 4 AD Regt which also starts focusing their training for a while as more of a Direct Fire Support unit with ADATS;
7) 2013 last year for 4 AD Regt - renamed and restructured to 4 Regt RCA (GS) (with 119 Bty, 127 Bty, and 128 Bty) - All remaining ADAT assets gone. 4 Regt (GS) currently provides ASCC, above brigade level FSCC and STACC, Medium Range Radars which are the ELM-2084 Multi-Mission Radar and CU172 Blackjack unmanned aerial systems.
So the correction is that the Total Force AD units (1 AD Regt, 18 AD Regt and 58 BAA) did not support 4CMBG but were in fact formed as 4 CMBG and 4 AD Regt were disbanded and were initially employed directly supporting the three Mechanized Brigade groups in Canada until tasked to augment 4 AD with five troops when if was reformed.
Sorry about that - mea culpa. The trouble is I knew all this and wrote a section in the book about it about four months ago. Mixed some apples with oranges here - temporary brain fart I guess.
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