WATU Wargame Returning to Liverpool

Kit Barry

Apr 29

It's the 80^th Anniversary of the Battle of the Atlantic, and back in 1943, the 6^th May marked the turning-point where we stopped losing and started making life so difficult for U-Boats that for a time they withdrew from the Atlantic entirely, and when they returned (in September 1943) they never again had the upper-hand.

So what better time to recreate the Western Approaches Tactical Unit wargame at WAHQ again?

Four Indian Navy Wrens (WRINS) plot ship movements on the Bombay Tactical Table. Two are wearing saris, two are Anglo-Indians in Western clothing.

Formed in 1942 to solve the U-Boat problem in the Atlantic, WATU was staffed almost entirely by women, and men unfit for duty at sea through illness and injury. The Wrens came from all walks of life and all across (what was then) the Empire, and were responsible for teaching the Allied navies convoy escort tactics: how to find and sink U-Boats.

Since the last time we played in 2018, I've found WATU Wrens alive and kicking, and learnt a lot more about how the game works, so this time we're playing with:

Actual pieces from the WATU game:

When WATU demobbed, Cpt Roberts gifted the ships to the Wrens as souvenirs: Leading Wren Helen Coop's ship has been scanned using photogrammetry, turned into CAD, and lovingly recreated by Ian Greig.

Leading Wren Helen Coop in uniform, 1944

In grey is a test-print with a filament printer, in translucent is a print from a UV-setting resin printer, and one laser-cut from wood, ready for painting:

Three replicas of Helen Coop's ship model, in various materials.

Actual game chits:

Leading Wren Helen Coop left us a treasure-trove in her scrapbook, including chits from actual WATU wargames played by Cpt Johnny Walker's support group:

A 1945 WATU wargame Move Chit. In pencil at the top it says Lt Cdr Wemyss Wild Goose. The Unit to move is J3, the Time is 44, the Course is 200, Speed 20, and General Intentions reads "Same, but more so. Send top priority signal to depot for new guns' crew"

Nothing changes in wargaming: after rolling a 1, Cdr Wemyss would like a new gun crew please

Plotting tools:

In the 2018 game we used a crude movement template to help with plotting, and mostly ignored turning circles. This was partly a simplification to help the players (WATU had the distinct advantage that their players came knowing how to command their ship and plot it on a chart! Our players were liable to try impossible things), and partly due to a lack of data. Since then I've found a lot more photos with details of the plot, and hunted down data on period ships which was not easy to find.

The result is this Rather Excellent [TM] recreation of the plotting protractor, laser-cut by Ian Greig. They work magnificently well and look amazing. Figuring out what they were from a handful of WATU photos might be my favourite bit of wargaming geekery

Side-by-side comparison of the Canadian Tactical Table protractor and our recreation.

Actual adjudication tables (probably):

Chris Carlson dug up some post-war ASW tables which are probably a later version of the WATU adjudication tables. One of the big mysteries of the WATU game has been how all that stuff happened, since the pre-war (1921 & 1929) RN War Game rules are not the WATU game (it's a fundamentally different game that's been mistaken for the WATU game by some because it mentions "screens", but it's very clearly talking about putting down screens on the plot to screen the surface ships from each other when they're out of visible contact, not viewing the entire plot from behind a screen to obfuscate the U-Boat tracks on the plot), and the contemporary descriptions forget to mention how you adjudicate an attack. Even these tables don't really explain how they're used, but they fit broadly with the assumptions we made for the 2018 game, which is pleasing!

Well…all except one thing: we used D100s, and it turns out that because dice were too new-fangled (or D100s were hard to come by in 1942, or the Temperance Movement had words), WATU used a 1 to 100 tombola.

Raspberry the Wargaming bear (in WRNS uniform) for scale next to a large wooden tombola. The bear could easily fit inside.

I appear to have bought one large enough for Raspberry to go to sea in… stop by WAHQ during the game and you can draw the fate of a U-Boat, Escort, or merchant ship from the adjudication tombola

U-Boat artefacts:

Big Heritage, who run the WAHQ museum, acquired a U-Boat during lockdown, and are busy renovating it and creating a Battle of the Atlantic Museum across the Mersey from WAHQ.

The original plan for this game was for the U-Boat players to play from the actual U-Boat, but the new museum is still a building site, so instead we're bringing some of the U-Boat artefacts over to WAHQ for the day. Our U-Boat players have been practicing with attack discs to get their firing solution. We'll see if they're able to sink anything!

We're also hoping to make use of the Y-Service teleprinter which has been refurbished to run off a Raspberry Pi, for sending our convoy relevant Engima decrypts.

Come to WAHQ on Saturday 6^th May and you'll get to:

Celebrate the remarkable achievements of the WATU Wrens!
Chat with the direct descendants of WATU about careers in professional wargaming: yes, you can get paid to play board/war/computer games for a living
See the WATU game in action, send some signals to the convoy if you'd like.
Explore the Western Approaches Museum, including their new Wrens exhibition, Leading Wren Helen Coop's WATU scrapbook, and bits from their newly-acquired U-Boat.
Say hello to a handful of PAXsims editors
Delight in a Derby House Principles wargame being played in the actual Derby House that the principles are named for.