nuk92
commented
2 years ago RTOP-11 request for Croatia #764 I'm unsure about the Decca 1290A. This could be either a false information or the RTOP-12 ship uses this one. The Decca BT502 Bridgemaster II seems to be the better radar as it has a range of 96nm (request will follow soon). So I'm not entirely sure about that. But either way the BT502 is listed in a source from 1994 and each ship has one navigation radar.
DB Selector
DB3K
Baseline
No response
Hypothetical
Yes
Name
RTOP-411 Sergej Mašera [Type 411] (RTOP-411, 412, 413, 414, 415, 416), Yugoslavia 1992+
Class
Type 411
Country
Yugoslavia
Service
Navy
In Commission
No response
Number in Service
6 planned
Length (m)
53.63
Beam (m)
8.54
Draft (m)
2.94
Standard Displacement (t)
315.2
Full Displacement (t)
381.8
Empty Displacement (t)
No response
Complement
33
Max Sea State
5
Primary Propulsion Type
Diesel
Propulsion
3x Zvezda M504B-2 Diesels
Fuel Capacity (kg)
62700
Flank Speed (kt)
36.6
Range (nm) at Speed (kt)
1800nm @ 18kts
Sensors
1x Decca BT 502
1x 9GA209
1x S.2150-01 [RWR] #1453
1x DLO-1 [LWR] #2327
1x PP-10M
1x 9LV200 Mk2 [Sensor Group]
1x Mk1 Eyeball
Mounts
1x 57mm/70 Bofors Mk1 (can be directed by 9LV200 Mk3 Sensor Group) 1x AK-630M 30mm/65 Gatling (can be directed by 9LV200 Mk3 Sensor Group) 2x Barricade DL 4x RBS 15B Twin (can be directed by 9LV200 Mk3 Sensor Group [not sure if necessary in CMANO?])
Aircraft & Docking Facilities
No response
Comms/Datalinks
Ship Codes
Degaussed Steel Hull, Onboard Degaussing Gear (Magnetometer), Aluminum Superstructure Only
Comments
Yugoslavia planned to build 6 fast missile boats (designated RTOP: Missile Gunboats) of the Type 411 type which would have replaced the Osa missile boats. These are equipped with Swedish Philips Elektronikindustrier AB (PEAB) 9LV249 fire control systems, which is the latest iteration of this system used by the Yugoslav Navy. (RTOP-401-404: 9LV202 / RTOP-405, 406: 9LV209 / VPBR-33,34: 9LV239). The FCS also uses the Stina Jadran datalink to share targeting data. The 6 vessels would have received the stern Bofors 57mm guns of the six Type 401 Rade Končar missile boats (stern guns were starting to be replaced by AK-630 CIWS on the Končar by 1991). Yugoslavia purchased RBS-15 missiles from Sweden for the Sergej Mašera in 1988. Yugoslavia failed to reach a favourable deal for Exocet missiles for the Končar in the late 1970s (which were originally planned). Thus with the introduction of the RBS-15 the Rade Končar would have received them too. During analysis it was determined that 4 RBS-15 missiles wouldn't have been enough for the Sergej Mašera. This vessels was designed with 8 RBS-15 in mind or a reduced loadout of 4 missiles when it carries sea mines which are placed between the launchers. The first ship of the Type 411 class was being built when Yugoslavia lost control of the shipyard on the Croatian Adriatic Coast in 1991. The ship RTOP-411 Sergej Mašera was finished and put into service by Croatia with the designation and name RTOP-11 Kralj Petar Krešimir IV. in 1992. The second ship RTOP-12 Kralj Dmitar Zvonimir was put into service in 2001. A request for the Croatian ahip was allready made a few months ago. Since the sources were mainly from Janes which isn't allways accurate you could make it a copy of this request which uses Ex-Yugo Forums and a book dedicated to Yugoslav Navy Ships as sources. The ingame name of the Croatian ship could be: RTOP-11 Kralj Petar Krešimir IV. [Ex RTOP-411 Sergej Mašera, Type 411] (RTOP-11, RTOP-12)
Sources
Ratni Brodovi Jugoslavenske Ratne Mornarice 1945-1991, Zvonimir Freivogel, Zagreb 2021, ISBN: 9789533660042; page 152
https://www.paluba.info/smf/index.php?topic=18469.0
https://www.paluba.info/smf/index.php?topic=18469.msg217432;topicseen#msg217432
S.2150-01 RWR on top mast: https://i.imgur.com/O5dX1vh.jpg
8x RBS-15: