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The version of the Aegis system used by CG-47~51 is the earliest first baseline (Baseline1), but CG-49~51 uses several improvements, including expanding the display screen of the battle center, electronic warfare program automation, and communication system. Connect with the national command network, strengthen operational principles and reliability, install tactical intelligence systems, etc., and install SQQ-28 helicopter data link/sonar signal processing system to cooperate with SH-60B anti-submarine helicopters (CG-47, 48 still Equipped with SH-2FLAMPSI anti-submarine helicopter system).

The Aegis system of CG-52~58 is the second baseline (Baseline2), and its improvements include the SWG-2 Tomahawk Weapon Fire Control System (TWCS) equipped with Tomahawk cruise missiles, the improved SQQ-89 anti-submarine combat system and Link -11 data link, etc., and began to replace MK-26 with MK-41VLS, and began to install SQR-19 towed array sonar from CG-54, and replaced the original SQS-53B bow sonar from CG-56 onwards Installed as SQS-53B, the anti-submarine combat system was upgraded to SQQ-89(V)3.

Bow bridge:

The Aegis system of CG-59~64 is the third baseline (Baseline3). The new improvements include the replacement of the new SPY-1B phased array radar and automatic locking system, the operation of the ship's radar in series, and the replacement of some displays with UYQ-21.

The Aegis system of CG-65~73 is Baseline 4. The original UYK-7 computer is replaced by UYK-43/44, the operation speed is increased by four to six times, and the UYQ-21 display is fully replaced.

In addition, CG-56~67 were replaced with new SQS-53B bow sonar, the anti-submarine combat system of CG-65 is still SQQ-89(V)3, integrated with SQS-53B(V)2 bow sonar, SQR-19B(V)3 towed sonar and MK-116Mod7 anti-submarine fire control system.

The anti-submarine fire control system of CG-66 and 67 is SQQ-89(V)7, and since CG-68, the newer SQS-53C bow sonar is used, and the anti-submarine fire control system is SQQ-89(V)6 .

Hull weight loss:

The design of the third Ticonderoga-class ship (CG-49) has undergone several modifications, including changing some of the hull compartments, expanding the piping for the fire protection system, changing the helicopter support facility to operate the SH-60BLAMPSIII anti-submarine helicopter, increasing the small caliber The carrying capacity of weapons and ammunition, etc., is the first Ticonderoga-class ship equipped with SH-60B, and the change of SH-60B has also resulted in an increase in the weight of CG-49 by 20 tons.

In order to improve the increasingly serious problem of the overweight superstructure of the first two ships of this class, CG-49 also introduced a number of weight reduction designs. First, the ballast of the first two ships was cancelled, and secondly, lighter, smaller and quieter screws were used. Type low-pressure air compressors replaced the reciprocating compressors used in the first two ships.

Modified the configuration of some cabins and cold storage, and applied some measures that have been proposed before but were not used in the first two ships.

For example, the honeycomb configuration of the main engine mixed exhaust pipe and the generator exhaust pipe (can reduce 10.6 tons).

CG-49 Vincennes:

The Ingalls factory proposed a further weight reduction plan, first replacing the hull material.

The 01 deck originally built with HTS high-tensile steel plate (yield strength about 50ksi, equivalent to 345MPa) was replaced by HY-80 high-tensile steel plate with higher strength (yield strength about 80ksi, about 549MPa) (which has always been used for submarines).

Chapter 125 Preview CG-52 Bunker Hill