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Here at LSOZI, we take a break every Wednesday to explore the old steam/diesel navies of the 1833-1954 period, profiling a different ship each week. These ships have a life, a tale all their own, which sometimes takes them to the strangest places.- Christopher Eger

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Warship Wednesday 18 March 2026:  A Lake by any Other Name

Above we see the very Commonwealth-oriented Loch-class frigate HMNZS Tutira (F 571) with a bone in her teeth off Korea between August 1950 and April 1951.

Built in Tyneside, she served with a Canadian crew under a different name during WWII before shipping to her new home a world away with a Kiwi crew– and a much different war against a new enemy.

The Lochs

The 151 frigates of the River class, built in 29 yards across three continents between May 1941 and May 1946, were a baseline for anti-submarine escorts in the British Royal and Commonwealth nations. While built in five slightly different groups, the Rivers were all generally 1,500 tons light/2,000 tons full load displacement, 301 feet overall length, and with a 36-foot beam. Using twin reciprocating steam engines that could generate about 5,500 shp, they could make 20 knots and steam for 7,000 at an economical 12.

Manned by a ~100-man crew, they carried a couple of 4″/40s augmented by an AAA suite but were primarily outfitted as sub-busters with a Hedgehog projector, up to eight depth charge throwers, two depth charge rails, and allowance for as many as 150 “ash cans.”

Where the Lochs were an incremental improvement over the Rivers was that they were gently larger (307 feet oal), were simplified in construction, used mercantile engineering machinery, and had an allowance for a single 4″/40 mount, then ditching the Hedgehog for a pair of triple-barreled Mark IV Squid ASW mortars. Each Squid could project three 440-pound depth bombs to 275 yards abeam.

Installed on only some 70 RN and Commonwealth frigates and corvettes during the war, Squid’s first successful use was by the Loch-class frigate HMS Loch Killin on 31 July 1944, when she sank U-333.

The Loch design catered to small yards with limited infrastructure through the miracle of prefabricated modular construction techniques. No subassembly of the ship would be larger than 29 feet long, 8.5 feet wide, and 8.5 feet tall, with a maximum weight of 2.5 tons to allow for easy lift by even the most modest of crane and rail systems. As much as 80 percent of the ship could be prefabbed and then sent for assembly in the graving dock, with great effort meant to eliminate curves in favor of straight-line construction.

The late-war sensor fit was advanced compared to what RN escorts were working with just a few years earlier, with the Lochs carrying Type 277 radars (good for detecting high flying aircraft out to 40 miles and surface contacts at 20) and Type 144 ASDIC with Type 147B depth finding sonars.

Using a pair of  VT4cyl (18.5, 31 & 38.5, 38.5 x 30ins) engines and two Admiralty 3-drum boilers, they could gen up 5,500 hp and push it out on twin screws. With 724 tons of fuel oil carried, these ships were slightly slower than the 20-knot Rivers, typically hitting 19.5 knots on trials and 18 or so when dirty and fully loaded at 2,200 tons displacement, but had a higher cruising speed (15 knots vs 12) for a 7,000nm range.

With class leader HMS Loch Achanalt (K424) ordered from Henry Robb Limited, Leith in July 1942, the first completed Lochs only started arriving in the fleet in early 1944.

While 110 hulls were planned and 82 ordered from at least 10 yards, peace intervened, and only 28 were completed, the rest being canceled or, in the case of 26, converted to Bay class AAA frigates for Pacific service with a much reduced depth charge capacity and no Squid mortars to allow room for a roughly doubled gun battery.

Meet Loch Morlich

Our subject is the only warship named for the peaceful 5,000-foot freshwater loch (Mhor Thalamic in Gaelic) in the Badenoch and Strathspey area of Highland, Scotland, near Aviemore. Ordered 13 February 1943 as Yard No. 1784 from the fine Tyneside firm of Swan Hunter, Wallsend, for construction at the Neptune Yard in Low Walker, the future HMCS Loch Morlich (K 517) was laid down five months later on 15 July 1943.

Loch Morlich was one of eight Loch class frigates ordered from Swan Hunter, with sister Loch Shin (K 421) ordered five months prior. Sister Loch Cree was instead completed by Swan as the South African Navy’s SAS Natal (K 10). Meanwhile, two other Swan-built sisters, the planned Loch Assynt and Loch Torridon, were instead completed post-war as the unarmed depot ships Derby Haven and Woodbridge Haven. Of the rest, Swan was told to cancel the planned Loch Griam, Loch Kirbister, and Loch Lyon as the war ended.

Launched 25 January 1944, Loch Morlich was bound for Canadian service and fully Canadian manned with her first skipper, T/A/LCDR Leslie Lewendon Foxall, RCNVR, assuming command while she was fitting out on 6 March 1944. Foxall had commanded the smaller Flower-class corvette HMCS Chilliwack (K 131) for two years on Atlantic convoy runs, so he knew his trade.

War!

With WWII well into its sixth year, Loch Morlich broke out her colors on 17 July 1944 and was assigned to the 8th Canadian Escort Group. Two other Lochs likewise went to the Canadians, Loch Achanalt (to the 6th CEG) and Loch Alvie (9th CEG), in July and August, respectively.

Morlich’s workups in the Western Approaches were delayed due to accidents while training, but she eventually made ready and sailed with her first convoys, MKS 067G and SL 176MK, on 17-18 November.

She would clock in on at least six other convoys over the next five months, most of them under the command of Lt. George Frederick Crosby, RCNVR, who took over from Foxall in December 1944.

The Lochs were on hand to corral the last of Donitz’s steel sharks at sea in May 1945.

The class is credited with assisting in the sinking of at least 17 U-boats as vetted by post-war examination boards.

After VE-Day, it was decided that the three Canadian-manned Lochs should return to England to prep for possible Pacific service under RN control. Morlich returned to Sheerness, and her Canadian crew was released on 20 June 1945, apparently returning home with the ship’s HMCS-marked bell. Paid off, the frigate was reduced to Reserve status.

Her RN crew never came, preempted by VJ Day.

No Lochs were lost in combat.

Meet Tutira

While some had thought the post-WWII New Zealand Squadron should be built around one of the RN’s many surplus aircraft carriers–after all, Canada and Australia had gotten into the flattop game as well– and, indeed, the Colossus-class carrier HMS Glory had operated from New Zealand as part of J Force in 1946, taking RNZAF Squadron No. 14 to Japan for occupation duties, RADM George Walter Gillow Simpson CB, CBE, head of the New Zealand Navy Staff in the late 1940s, instead championed for a smaller, more anti-submarine, force.

A series of non-violent mutinies among the ships of the NZ fleet in April 1947 over poor living and working conditions, coupled with outrageously low pay, further emphasized the downshift from such lofty carrier goals, and J Force returned home from occupation duties by September 1948, its mission complete.

While over 10,000 men served in the RNZN and RNZNVR during WWII on 60 commissioned ships, by the late 1940s, the peacetime New Zealand fleet shrank to just 2,900 officers and men, enough to man two 5,900-ton light (5.25-inch gunned) Dido class cruisers (HMNZS Black Prince and Bellona, later Royalist), six surplus ASW frigates, four 1,000-ton Bathurst-class escort minesweepers, eight minesweeping trawlers (including the famous Kiwi and Tui), the disarmed River-class frigate Lachlan used as a survey ship, a dozen 72-foot MLs, as well as miscellaneous tenders and tugs.

The half-dozen above-mentioned “surplus ASW frigates” were laid up Lochs that were sold to NZ for the princely sum of £1,500,000 for the lot, weapons included, transferred between 13 September 1948 and 11 April 1949 after refits. Loch Morlich in particular went for £228,250.

Taking a page from their original loch names, in NZ service they earned names of lakes from their new home country, with Loch Eck becoming HMNZ Hawea, Loch Achray – Kaniere, Loch Achanalt – Pukaki, Loch Katrine – Rotoiti, Loch Shin – Taupo, and our Loch Morlich now HMNZS Tutira. They kept their old pennant numbers, just changing the K to an F, with Loch Morlich (K 517), for example, becoming Tutira (F 517) in New Zealand service.

The NZ Lochs were soon frolicking in their home waters in exercises with the British East Indies Fleet and RAN.

On 12 May 1950, LCDR Peter James Hill Hoare, RN, assumed command of Tutira. Born just months before Jutland, the 34-year-old Hoare had graduated from the Nautical College at Pangbourne and earned his lieutenant’s stripe in 1938, going on to command the sloop HMS Bridgewater (L 01) and frigate HMS Hoste (K 566) on Atlantic convoy duties during WWII. He would soon be in his and Tutira’s second war.

Korea

Just three days after North Korea invaded its democratic neighbor to the South, New Zealand answered the call of the United Nations and said it would be dispatching two warships.

Those ships were our Loch Morlich/Tutira and Loch Achanalt/Pukaki, which ironically were two-thirds of the Lochs that had served with the Canadians during WWII.

As noted by the NZ Navy Museum, Torpedo Bay:

On the 3rd of July, HMNZS Tutira and Pukaki left Auckland. The ships arrived in Korea on the 27th of July and were given an escort role with up to four convoys a week. The assigned task of the frigates was described as the most thankless of the sea war – ‘dull, daily routine patrol’. However, this work was of vital importance to the United Nations cause in Korea. The commander of the U.S. Naval Forces, Vice Admiral Joy, noted ‘The unspectacular role of carrying personnel and supplies to Korea was perhaps the Navy’s greatest contribution’.

Skipped over in that description is the fact that the two NZ frigates were on hand for the famed amphibious landings at Inchon on 15 September 1950 as part of TG 90.7 (the screening and protective group) and patrolled the waters just off the bridgehead to guard the Marines ashore from potential seaborne attack.

Then came use with the U.S. Navy task group off Wonson in October. It was there that one of Loch Morlich’s crew, Petty Officer Henry Matthew Blizzard, was killed by shrapnel from an exploding mine, one of just three RNZN personnel killed during the war.

The NZ frigates remained in Korean waters until early November, when they were sent to Sasebo, Japan, for quick refit.

An RN photographer caught up to Tutira in Japan in November 1950 and captured some great images of her crew, which included several English lads and at least one Scot.

Early 1951 saw Tutira and Pukaki patrolling Korea’s coast, supporting the evacuations from Inchon and Chinampo, and later supporting ROKN mine-clearing operations. In particular, they took turns operating with the South Korean Navy minesweepers YMS 502 and YMS 503 between 15 March and 7 April.

RNZN frigate crews in Korea often went ashore in several “Nelsonian” night raids against coastal targets and took several prisoners for intelligence gathering. One of Tutira’s former sailors, Able Seaman Robert Marchioni, who joined the crew of her sister Rotoiti, was killed ashore on 26 August 1951 on one such nocturnal raid near Sogon-ni while trying to do a prisoner grab on a Chinese gun emplacement. Marchioni’s body was never recovered.

While Pukaki was relieved by sister Rotoiti in February 1951, Tutira remained on station for three more months until relieved by sister Hawea, only arriving back home in Devonport on 30 May, having steamed 35,400 miles and having been away from New Zealand for nearly 11 months. LCDR Hoare and two ratings were awarded a Mention in Despatches, and the ship earned her only battle honor (Korea 1950-51).

New Zealand’s naval involvement in the Korean War lasted three years and involved all six of its Lochs, with the last, Kaniere, returning home on 2 March 1954. Almost half the manpower of the RNZN– approximately 1,350 officers and ratings-  shipped out for Korean waters over those nearly four years. In their eight tours (Rotoiti and Hawea both went twice), the New Zealand Lochs steamed 339,584 nautical miles and fired 71,625 rounds of ammunition in action.

Kayforce, a New Zealand Army artillery and engineer detachment that served in Korea from December 1950 onward with the 27th British Commonwealth Infantry Brigade, saw 4,600 men rotate through its ranks before it was finally brought home in July 1957, suffering 42 deaths and 79 wounded.

End time

After service with the 11th Flotilla and fleet exercises with the Australians, in August 1953, the well-traveled Tutira was put into reserve at Auckland, then partially refitted and given limited sea trials in late June 1954. Following these trials, she was partially cocooned and not modernized as her sister vessels had been. Placed in extended reserve, she was slowly and extensively cannibalized for parts to keep her active duty sisters on the job.

In February 1957, with the realization that, under SEATO, a future Pacific War would likely see combat against roaming Soviet submarines, the NZ government ordered a pair of Type 12 (Rothesay) class ASW frigates to be built eight months apart in Britain at Thornycroft and White, respectively. Named HMNZS Otago (F 111) and Taranaki (F 148), the 2,500-ton frigates were modern with a Seacat missile system, Limbo depth charge mortars, and a twin 4.5-inch turret. They were followed by a third, improved Type 12 (Leander) class, HMNZS Waikato (F 55) in 1966, while a fourth Type 12, HMS Blackpool (F 77) was leased from the RN.

These new vessels meant the New Zealand admiralty could divest itself of its obsolete WWII-era cruisers and frigates. Black Prince reverted to RN control and was scrapped in Japan in 1962, while Royalist was decommissioned in 1966, likewise reverting to the RN for disposal.

Of the Lochs in NZ service, Taupo and Tutira were sold for scrap to a Hong Kong-based broker on 15 December 1961, with Hawea and Pukaki following in September 1965. The final pair, Rotolti and Kanire, by then classed as 2nd Rate Escorts, served until they were disposed of in 1966.

As far as her Loch class sisters still afloat elsewhere, the RN kept a couple in service as F-pennant frigates (Loch Lomond and Loch Killisport) until as late as 1965, while Loch Fada served as a missile test bed until 1970– vetting Sea Wolf. One interesting sister who began life as Loch Eil was converted to a Bay class AAA frigate (Herne Bay), finally became the survey ship HMS Dampier, and was kept until 1968.

Of interest, Dampier, limping along with a broken shaft from Freetown to Chatham in December 1967, hoisted three lug sails and a set of square sails made from awning canvas to gain an extra knot or two to make England just in time for Christmas– thus is the pluck of frigatemen.

The South Africans kept their trio of Lochs active well into the 1970s, with the last, SAS Good Hope (ex-Loch Boisdale) scuttling in December 1978, the final member of the class. She remains part of an artificial reef some 101 feet under False Bay near Cape Town.

Epilogue

One of the Loch Morlich’s/Tutira’s 3-pounder guns has been preserved ashore at the stone frigate HMNZS Philomel, the RNZN base at Devonport, Auckland.

Her 1944-marked HMCS Loch Morlich bell, presumably removed before she went to New Zealand, has long been in private hands and was sold at auction in Boston last year for less than $3,000.

A For Posterity’s Sake page exists for Loch Morlich’s RCN veterans.

She and her sister Pukaki are also remembered in maritime art, immortalized on their Korean deployment.

CDR Peter James Hill Hoare, OBE, Tutira’s Korean War skipper, retired from the RN on 29 January 1966, capping 28 years in uniform. He passed away in 1984, aged 68.

The Loch Class Frigates Association was formed in 1993 but held its last reunion in 2019 and disappeared from the internet in 2023. Before they faded away, they established a memorial cairn at Alrewas in 2005, finished with stones from each of the 28 Lochs completed.

Likewise, a Loch class frigate is featured on the Korean War memorial plaque at Devonport, New Zealand, dedicated by the New Zealand Korea Veterans’ Association in 2000. It rests upon a stone donated by the city of Pusan.

As you may remember, Devonport Naval Base is where Tutira and Pukaki sortied from for Korea on 3 July 1950.

Thanks for reading!

Meminisse est ad Vivificandum – To Remember is to Keep Alive

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