Sarthuun-Class Fast Battleship

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Sarthuun-Class Fast Battleship
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Service Information
Nation	Republic of Gondara
Branch	Navy of Gondara
Class	Sarthuun-Class
Type	Fast Battleship
Role	Fleet Capital Ship
Status	Active
Cost	$71,000,000 (1939 USD)
Program Cost
Operator	Republic of Gondara Navy
Construction
Builder	Southeastern Delta Shipyards
Laid down
Launched
Commissioned	1939
Retired
Planned
Completed
Active
Lost
Class Lineage
Preceded by
Succeeded by
General Characteristics
Standard displacement	48,500 long tons
Full load displacement	56,500 long tons
Length	850 ft (overall); 835 ft (waterline)
Beam	108 ft
Draft	36 ft
Complement	2,520 personnel (120 Officers, 2,400 Enlisted); +400 Flag Staff
Propulsion and Performance
Propulsion	8 × High-pressure boilers; 4 × Geared steam turbines
Power	212,000 SHP
Shafts	4
Speed	32 knots
Range	15,000 nautical miles at 15 knots
Endurance
Sensors and Fire Control
Radar	None (Radar Ready)
Sonar	Active/Passive Sonar
Fire control	Triple-redundant optical analog fire-control system
Protection
Belt armor	350 mm Face-Hardened Cemented Steel (19° internal slope)
Deck armor	150 mm High-Tensile Homogeneous Steel; 38 mm Splinter Deck
Turret armor	450 mm Face; 300 mm Sides
Conning tower	400 mm
Torpedo protection	Four-layer liquid/void defense system
Armament
Main armament	12 × 375 mm L/50 (3 × Quadruple Mounts)
Secondary armament	16 × 125 mm DP (8 × Dual)
Anti-aircraft	16 × 75 mm DP (8 × Dual); 20 × 25 mm AA (10 × Dual); 16 × 12.5 mm AA (8 × Dual)
Torpedoes	None
Anti-submarine warfare
Mines
Aviation
Aircraft	3 × Floatplanes
Aviation facilities	2 × Stern Catapults

Overview

The Sarthuun-Class Fast Battleship formed the centerpiece of the Republic of Gondara Navy's Expeditionary Fleet. Commissioned in 1939 at a unit cost of $71,000,000 USD, the class combined heavy protection, high volume of fire, and fleet-carrier speed to serve as the primary surface combatant of Gondaran Expeditionary Task Forces.

Unlike earlier battleship concepts designed for independent action in enclosed seas, the Sarthuun-Class was conceived from the outset to master the "Tyrant of Distance" in the South Pacific. The vessel integrated deep-bunker fuel reserves, high-efficiency steam turbines, and robust hull metallurgy to support long-range blue-water deployments without sacrificing strategic mobility or tactical survivability.

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Development

The Sarthuun-Class was developed following the Republic's transition from a regional defensive navy to a true blue-water expeditionary force. Naval planners determined that existing heavy cruisers lacked the firepower and protection required to decisively defeat enemy capital ships while accompanying fast carrier formations over trans-oceanic distances.

Rather than pursuing ever-larger gun calibers that bloated turret barbettes and overall displacement, Gondaran designers selected twelve high-velocity 375 mm L/50 naval rifles housed in three quadruple turrets. This configuration provided a higher density of fire and faster salvo-ranging capabilities while significantly reducing total armored citadel weight compared to conventional 16-inch triple-turret designs.

A principal engineering constraint was that the vessel maintain a maximum beam of 108 feet to satisfy Panamax lock limitations. This allowed unrestricted, rapid transit between Pacific and Atlantic theaters, preserving complete strategic flexibility for Gondara's global naval defense.

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Design

Main Battery

The primary armament consists of twelve 375 mm L/50 naval rifles mounted in three quadruple turrets arranged with two superfiring forward ('A' and 'B') and one aft ('Y').

To ensure mechanical reliability and prevent catastrophic single-point jamming, each quadruple turret was engineered as a "pseudo-quad"—internally divided by a 50 mm longitudinal armored bulkhead into two independent twin-gun houses sharing a single barbette structure. Each twin pair possessed its own dedicated ammunition hoists, elevation drives, and shell-handling rooms.

This layout solved the severe jamming problems that plagued early interwar quadruple mounts while permitting tight 12-shell salvo spreads. The design emphasized sustained, accurate long-range gunnery, reflecting Gondaran doctrine that multiple rapid hits are more decisive at extreme ranges than fewer larger-caliber impacts.

Protection

The class utilizes a high-grade face-hardened cemented steel armor scheme applied under an All-or-Nothing protective philosophy, concentrating heavy plating strictly over vital machinery spaces, magazines, and command centers.

The main belt features a 350 mm face-hardened steel plate set at an internal slope of 19 degrees. When combined with the vessel's hull geometry, this slope yields an effective horizontal thickness exceeding 420 mm against direct shell trajectories at standard engagement distances (20,000–26,000 yards). Deck protection consists of a 150 mm high-tensile homogeneous steel main armored deck over a 38 mm splinter deck, offering exceptional immunity against plunging fire and high-altitude bombing.

To support routine operations in sub-polar transit corridors, a reinforced 50 mm high-tensile forward ice belt extends along the waterline to the stem, protecting the bow structure against drift ice and heavy seas during deployments into Antarctic waters and the Southern Ocean.

Propulsion & Range

Power is provided by eight high-pressure water-tube boilers feeding four sets of high-pressure geared steam turbines producing 212,000 shaft horsepower. Driving four solid-bronze screws, this plant propels the 835-foot waterline hull to a maximum speed of 32 knots.

To overcome the immense distances of South Pacific operations, the hull was designed with deep double-bottom fuel bunkers capable of carrying over 8,000 long tons of heavy fuel oil. This gives the Sarthuun-Class an unrefueled operational radius of 15,000 nautical miles at a cruising speed of 15 knots, allowing the ship to execute long-range trans-oceanic patrols, conduct combat operations, and return to base without relying on forward coaling or fueling stations.

Fire Control

The Sarthuun-Class incorporates three independent, triple-redundant optical fire-control centers responsible for:

- Main Battery (incorporating 10-meter coincidence rangefinders atop the main tower and turrets) - Secondary Battery - Anti-Aircraft Battery

This arrangement allows multiple batteries to engage separate air and surface targets simultaneously while preserving uninterrupted fleet command capability if one station suffers damage. The ship was also constructed with electrical reserve capacity and reinforced mast platforms specifically engineered for retrofitting early search and fire-control radar systems.

Command Facilities

When serving as a fleet flagship, the class accommodates approximately 400 additional command personnel, communications specialists, and staff officers within an expanded armored flag bridge and central operations compartment.

Within Gondaran doctrine, however, overall command authority resides with the embarked Fleet Admiral rather than the vessel itself.

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Operational Doctrine

The Sarthuun-Class serves as the principal surface combatant of each Gondaran Expeditionary Task Force.

Its responsibilities include:

- Defeating enemy capital ships and heavy surface raiders. - Coordinating fleet surface engagements and outer perimeter screens. - Providing heavy surface protection for fleet carriers against enemy gunlines. - Delivering sustained heavy naval gunfire support for amphibious operations. - Serving as Fleet Flagship for major theater operations.

Unlike many contemporary interwar battleships designed for independent line-of-battle duels, the Sarthuun-Class was conceived as the centerpiece of a balanced expeditionary fleet, operating seamlessly alongside fleet carriers, heavy cruisers, anti-aircraft cruisers, and fleet destroyers.

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Ships of the Class

Ship	Builder	Commissioned	Status
GNS Sarthuun	Southeastern Delta Shipyards	1939	Active
GNS Honorable	Southeastern Delta Shipyards	1940	Active
GNS Integrity	Southeastern Delta Shipyards	1941	Active

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Legacy

The Sarthuun-Class represented the culmination of Gondaran capital ship development. Rather than pursuing ever-larger gun calibers at the expense of fleet mobility, the Republic emphasized balanced fleet integration, high volume of fire, sub-polar seaworthiness, and trans-oceanic endurance.

Although the rapid development of naval aviation gradually shifted primary offensive capability toward carrier air groups, the Sarthuun-Class remained the Republic's supreme surface combatant throughout World War II, serving as an irreplaceable fleet flagship and anti-surface shield across the South Pacific.

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See Also

- Navy of Gondara - Gondaran Expeditionary Task Force - Vantage-Class Heavy Cruiser - Skylook-Class Light Cruiser - Fleet Carrier