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Commandant-Rivière-Class frigates
This class resulted from De Gaulle’s priority shift from a NATO-first to a France-first strategy. Instead of their single-purpose convoy escort predecessors of the E50/52 type, these somewhat larger frigates were designed primarily for intervention in France’s remaining or former colonies and enforcing France’s interests in the third world, with ASW being a secondary concern. They received a powerful gun battery for their size, enabling them to attack shore targets, and their muzzle-loading quad ASW mortar forward also had a secondary shore bombardment capability. They had additional accommodation for 80 marines and could substitute their boats with LCPs for landing missions. Armament was completed by two 30mm Hotchkiss autocannon and two triple ASW TT sets without reloads, reflecting the shift away from ASW. They also were somewhat slower than their predecessors, at 25 kts. Four early units (Commandant Rivière, Victor Schoelcher, Amiral Charner and Commandant Bory) had streamlined bridge windows sloping inward.
The other five (Commandant Bourdais, Balny, Doudart de Lagree, Enseigne Henry and Protet) had outward-canted bridge windows, probably to eliminate reflections of bridge instruments in the windows.
All but two had twin-shaft diesel powerplants. Commandant Bory was fitted with free-piston gas generators driving twin-shaft gas turbines instead (don’t ask me what exactly a free-piston gas generator is), which had no impact upon her external appearance. Apparently, they didn’t work very well, and were replaced by a standard diesel installation in 1974. Balny however trialled France’s first CODAG engine, consisting of two cruising diesels and a SNECMA Atar 8 gas turbine, all clutched to a single shaft. Due to the compactness and low weight of this installation, she was a hundred tons lighter than the others (also owing to the fact that the engines left no space for turret Y’s magazines, so she had only turrets A and X). Her slight range advantage was bought with a significantly lower cruise speed; apart from that, the installation worked reliably. Top speed was slightly higher (26 kts) as on her sisters. Prolonged trials delayed her entry into service till 1970.
In the early 70s, three units – Amiral Charner, Commandant Bourdais, Enseigne Henry – were fitted with a helicopter landing platform instead of turret Y, for trials. By 1975, all three had their turrets back.
In the late seventies, all except Balny had turret X replaced by four single MM38 Exocet launch canisters. They also received a new navigation radar, landing the obsolete DRBV-50 target indicator, and their single gun director was upgraded with a newer radar. They also landed their 30mm Hotchkiss guns and replaced them with Bofors 40/70s. Schoelcher had an additional deckhouse fitted between the launch canisters, which is not visible on photos of the other units (although I don’t claim to have seen them all).
In this guise, they spent the rest of their service life.
Commandant Bory had her 305mm ASW mortar removed in 1990; I found no evidence for this modification on any of the others.
Schoelcher, Bourdais and Charner were sold to Uruguay between 1988 and 1991. Rivière had already been downgraded to sonar trials ship in 1985. The others were retired between 1992 and 1996. Their replacements were five Lafayette-class frigates and six Floréal-class OPVs.
Cheers
GD