NEI submarine chasers

by **Visje** » Mon Jan 22, 2007 21:47

I think we need to distinguish between a number of different classes of ships

- the purpose-built submarine chasers laid down in the Netherlands. These had, as far as I know, nothing to do with the ships in the Netherlands East Indies.

- the submarine chasers laid down in the Netherlands East Indies. These latter ships were Gouvernements Marine ships. I have a file from the National Archives, which gives an overview of the building program for the GM. The text is as follows:

"...3 motorvessels of about 300 tons displ, which are fitted out as auxiliary submarine chasers and minesweepers. Speed ca. 20 knots. For each of these ships are neede two dieselengines of about 1300 bhp each, diesel generators, electrical instalations, pumps, windlasses, shafts and propellors, motors for motorboats and all kind of equipment to be purchased in the U.S. More are to be built in the coming years...".

In addition, the book by Backer Dircks "De Gouvernements Marine in het voormalige nederlands-indië 1849-1949", volume 3 refers on page 140 to the socalled "B"-cruisers, with a displacement of 310 tons each, two shafts, and a speed of 18 knots. These ships would be multi-purpose, suited for minesweeping and ASW. They were to be built in Tandjong Priok.

Bosscher "De Koninklijke Marine in de Tweede Wereldoorlog", volume 2, refers on page 383 to three auxiliary minesweepers/submarine chasers of 310 tons each. As source, he uses L.L. von Münching "Schepen van de Koninklijke Marine in de Tweede Wereldoorlog" and he presumed Von Münching meant the B-cruisers. I flipped that book, but I found reference only to the B-cruisers of 130 tons, but not to ships of 310 tons!

I haven't figured out yet what's going on here ....

Cheers,
Visje

by **Berend** » Tue Jan 23, 2007 00:53

The Cha 103 Class: CHa 103, CHa 105, CHa 106, CHa 107, CHa 114 and Cha 115.

Attached a picture of the CHa 103.

Regards

Berend

by **Bob R.** » Tue Jan 23, 2007 12:06

According to my file auxiliary minesweepers in NEI:

In 1942 there were three ships under construction at the Droogdok Maatschappij Tandjong Priok.
There were nominated as B-1, B-2 and B-3, no names allocated as yet.
The ships, described as auxiliary minesweepers/submarine chaser, were destroyed on the ramp in February/march 1942.
The scarce date on these ships:
Tonnage 310 ton, max speed 18 range 2300 NM.

Bob Roetering

by **Visje** » Tue Jan 23, 2007 20:57

Bob R. wrote:According to my file auxiliary minesweepers in NEI:

In 1942 there were three ships under construction at the Droogdok Maatschappij Tandjong Priok.
There were nominated as B-1, B-2 and B-3, no names allocated as yet.
The ships, described as auxiliary minesweepers/submarine chaser, were destroyed on the ramp in February/march 1942.
The scarce date on these ships:
Tonnage 310 ton, max speed 18 range 2300 NM.

Bob Roetering

Hi Bob,

Thanks for the info. You learn something new every day (didn't know the range figure yet). May I ask where you got this info from?

Thanks,
Jan Visser

by **Bob R.** » Tue Jan 23, 2007 21:08

Hallo visje,
Ja natuurlijk,
Bron Schepen der KM in Wereldoorlog II door L.L. v. Munching blz 95 en De KM in WO II door Bosscher bijlage 6.
Bob Roetering.

by **Folkert** » Tue Jan 23, 2007 21:25

CHa-103 class auxiliary submarine chasers

Displacement 130t standard
Length 42.4m pp, 45.6m oa
Width 5.0m
Draught 1.4m
Machinery 2-shaft gasoline engine, 1500hp (CHa-105/107/108 1800hp, CHa-106 1200hp)
Speed 19kt (CHa-106 16.5kt)
Armament 1-47mm gun, 1-13.2mm AA, 1-7.7mm MG, 32 DCs
Complement 18?

--------------------------------------------------------------------------------

Name Plan Builder Laid down Launch Complete
CHa-103 - Net Soerabaya NYd
(102nd NF) ? 1942 1942. 8.31 CHa
(ex-Net B1) 1945. 8.28 to Net
1945? disc
CHa-105 - Net Soerabaya NYd
(102nd NF) ? 1943. 1.11 1944. 1.25 CHa 1945. 6.16 sunk
(torpedoed, N of Soerabaya)
[06.52S, 111.45E]
1945? disc
CHa-106 - Net Soerabaya NYd
(102nd NF) ? 1943. 3.24 1944. 9. 2 CHa 1945. 8 to Net
1945? disc
CHa-107 - Net Soerabaya NYd
(102nd NF) ? 1943. 2.27 1945. 1.30 CHa 1945. 8 to Net
1945? disc
CHa-108 - Net Soerabaya NYd
(102nd NF) ? 1943. 4.22 - 1944. 5.17 sunk incomplete
(air attack, at Soerabaya)
CHa-114 - Net Soerabaya NYd
(102nd NF) ? 1943.11.30 1944. 6.23 CHa 1945. 8 to Net
1945? disc
CHa-115 - Net Soerabaya NYd
(102nd NF) ? 1943.11.30 1944. 9. 2 CHa 1945. 8 to Net
1945? disc

:wink:

by **Folkert** » Tue Jan 23, 2007 21:27

CHa-111 auxiliary submarine chaser

--------------------------------------------------------------------------------

Displacement 26t standard
Length 18.9m oa
Width 3.9m
Draught 1.1m
Machinery 2-shaft diesel, 300bhp
Speed 14.5kt
Armament 2-13.2mm AA, 4 DCs
Complement ?

--------------------------------------------------------------------------------

Name Plan Builder Laid down Launch Complete
CHa-111 - Net Tandjong ? 1941 - Net P-11/12 ? 1942. 3 captured
1942.12.20 CHa-111
1943. 7.22 sunk
(air attack, at Soerabaya)
1943.11. 1 disc

by **Folkert** » Tue Jan 23, 2007 21:28

CHa-112 class auxiliary submarine chasers

--------------------------------------------------------------------------------

Displacement 179t standard
Length 42.8m pp, 45.0m oa
Width 6.0m
Draught 1.5m
Machinery 2-shaft recipro, 1 boiler, 700ihp
Fuel oil 40t
Speed 14.5kt
Armament 1-47mm gun, 3-25mm AA, 1-13.2mm AA, 8 DCs
Complement ?

--------------------------------------------------------------------------------

Name Plan Builder Laid down Launch Complete
CHa-112 - Net Willemsoord NYd ? 1929. 9.24 1930. 8. 4 Net B 1942. 3. 1 sunk
1942. 3 captured
1942.12.20 CHa-112
1945. 6. 4 sunk
(air attack, Java Sea)
[05.00S, 116.04E]
1945? disc
CHa-113 - Net Willemsoord NYd ? 1929. 4.19 1930. 8. 4 Net A 1942. 3. 1 sunk
1942. 3 captured
1943. 1.17 CHa-113
1945. 6.23 sunk
(torpedoed, Java Sea)
[05.44S, 114.16E]
1945? disc
CHa-116 - Net Willemsoord NYd ? 1929 1930. 8. 4 Net C 1942. 3. 6 sunk
1942. 3 captured
1943. 4. 8 CHa-116
1944.11.13 sunk
(air attack, W of Luzon)
[14.30N, 120.45E]
1945. 1.10 disc

by **Folkert** » Tue Jan 23, 2007 21:28

CHa-117 class auxiliary submarine chaser

--------------------------------------------------------------------------------

Displacement 131t standard
Length 29.3m pp, 31.6m wl
Width 5.5m
Draught 1.8m
Machinery 1-shaft diesel, 300bhp
Speed 12kt
Armament 1-47mm gun, 1-13.2mm AA, 1-7.7mm MG, 32 DCs
Complement 17?

--------------------------------------------------------------------------------

Name Plan Builder Laid down Launch Complete
CHa-117 - Net Tandjong 1938 1938 1939 Net Bantam 1942. 3. 3 sunk
1942. 3 captured
1943. 8.10 CHa-117
1945. 7.23 sunk
(torpedoed, near Bali I)
[08.10S, 115.29E]
1945? disc

by **Bob R.** » Wed Jan 24, 2007 17:34

Correctie.
In mijn vorige berticht zei ik dat ik het bereik van de B -schepen 2300 mijl was.
Achterdochtig geworden door de vraag van Visje heb ik het toch nog maar eens gecontroleerd en inderdaad, ik heb kolommen verwisseld. Het bereik is mij onbekend.
Het machinekamer vermogen daarentegen is 2300 (a?) pk en de max vaart 18 kn.
Excuses voor de verwarring.
Bob Roetering.[/quote]

by **u-boot** » Mon Apr 20, 2009 20:06

Van de bewakingsvaatuigen B1-B16 zijn aan het einde van de oorlog 4 eenheden teruggevonden.

De CHa 103 (ex B1) werd met o.a. 2 ex TM boten op 22 september 1945 door Australische troepen in beslag genomen te Amboina. Deze boot had 2 Kermath benzinemotoren en is waarschijnlijk via de Serle task Force bij de KM gekomen als RP 135 (1)

De Cha 106 (met 2 Lorraine motoren) werd te Tandjong Priok aangetroffen en is overgedragen aan de DVS waarna zij tot april 1947 dienst deed als woonboot/opslagboot. Mogelijk was dit de eerste RP 144.

De Cha 108 werd zwaar beschadigd, in reparatie, aangetroffen te Soerabaja, maar is gesloopt.

De Cha 115 (met Kermath motoren) werd in takt te Soerabaja aangetroffen. Deze boot is mogelijk de in het onderwerp RP boten genoemde RP 15, later RP 148 (1) geweest. De boot is later gebruikt als veerboot tussen Soerabaja en Madoera.

Van dit type Cha bestaat een miniatuur scheepsmodelletje van Akimokei , schaal 1/500.

Overigens, de Cha 102, 104, 109, 110 en 118 waren NIET de voormalige hulpmijnenvegertjes, Ardjoeno, Gedeh, Kawi, Lawoe en Salak.
De jagers waren in tegenstelling tot de vegertjes dubbelschroevers met 2 Kermath motoren van elk 500 pk. Zij vertoonden volgens Japanse bronnen enige gelijkenis met de P9 klasse waarvan zij de P14 in dienst hadden als Cha 111.

In werkelijkheid waren de Cha 102 type boten eenheden van de kennelijk in de vergetelheid geraakte paptrouilleboten van de P17 klasse.

Hiervan is de Cha 104 gevonden in Tandjong Priok en de Cha 118 te Soerabaja.
Hoogstwaarschijnlijk zijn zij teruggekeerd bij de KM als RP 144 (2) en RP 145 (2). Een va deze boten is afgebeeld, naar wordt verondersteld , bij de Serle Task Force. De afgebeelde boot in onderwerp Serle is NIET een boot van de P5 klasse (zie patrijspoorten en dekhuis achter).

Tenslotte, voor de volledigheid, de eerdere RP 145 was de sleepboot Bromo 1, die korte tijd met de RP 143 (Bromo 2) vanuit Soerabaja dienst deed en naar de DVs overgegaan is als sleepboot Irma (T-105).

J. Verhagen

by **ThePimster** » Mon Apr 20, 2009 20:18

Eventhough the crewmember who started this topic has not been aboard in over a year, all topics and replies in this forum should be written in the English language.

Thanks for you cooperation.

Mr. Verhagen, (u-boot) thanks for the detailed info :bravo:

by **JAKW** » Sun Apr 11, 2010 22:42

Mr. J. Verhagen (U-boot),

I think all members would appreciate if you could tell us about your sources.
This information concerning the Japanese Cha boats clearly does not come from standard Dutch sources, nor from Dutch Archives.

Jan