Haizum howitzer

The Haizum (Tipsprek: Kanoneferager 4.5T «Hazjum») is a Tiperyner and Kayan 147mm wheeleed. It is based on the Kayan 8×8 Samoyed series of tactical trucks, which is the most common heavy tactical truck in Tiperyner service. It was adopted as a replacement for towed 147mm (Tiperyner 4.5-inch) howitzers in wheeled mechanized formations, such as Tiperyn's Continental Contingency Regiments (KKR) and Kaya's Redhorn and Jade Serpent Banner Armies. Its name is derived from the, as its cannon is designated «Gabrjel».

As of 2023, the Haizum was the most numerous 147mm self-propelled guns in the Tiperyn and Kayan militaries. In the Tiperyn Realm Guard, 15 cannon battalions are planned to be equipped with Haizum by 2026, compared to eight battalions equipped with the tracked 147mm «Aurjel». In the Kayan Unified Armies, there are 12 Haizum battalions and four armored artillery battalions. However, there are more 115mm self-propelled guns in both militaries, acting as regimental guns in the Kayan military and "direct support" guns in Tiperyner cannon regiments supporting specific maneuver regiments. The 147mm guns typically act in support of division-sized elements.

Armament
The Haizum is defined by its use of a 147mm L/51 cannon, designated in Tiperyn service as Kanon 4.5T «Gabrjel». The "4.5T" comes from 4½ Tiperyner inches and not tonnes. Generally, for marketing and export purposes, Tiperyn self-propelled howitzers are labelled as Haizum provided they are equipped with the Gabrjel cannon, have no turret, and are mounted on a heavy truck chassis.

The 147mm L/51 is capable of hitting targets up to 50 km away with the newest rocket-assisted projectiles or GPS-guided shells at full charge (fired at maximum elevation), 41 km with extended-range base-bleed shells, or 32 km away with standard HE shells. The Haizum natively supports precision guided munitions. A total of 28 complete rounds can be carried onboard in ammunition containers mounted on both sides of the vehicle forward of the gun. The paired ammunition replenishment vehicle can load new charges and shells in these containers without requiring excess lifting from gun crews. The Haizum also features a semi-automatic loading system whereby two loaders on each side of the gun can stage the following shot in side-mounted trays, which are automatically swung and rammed into the gun. In Tiperyn and Kayan service, charges are loaded from the left side of the vehicle while shells are loaded from the right. This allows for reduced strain on the gun crew, a smaller crew overall, and a maximum fire rate of 6 rounds per minute, although the sustained fire rate is 0.5-2 rounds per minute depending on the charge and duration as limited by gun's temperature sensor.

Mobility
Haizums built for the Tiperyner, Kayan, and Ringeriker militaries are based on the Samoyed 8x8 tactical truck, while versions built for the Sannlig military are based on the Lastebil 19 8x8. Both version are mobile off-road, with the intent of being able to keep up with wheeled mechanized forces in a close support role. As the howitzer and ammunition only add about two tonnes to the weight of the vehicle, performance is closer to an unladen Samoyed than one carrying a typical cargo load.

A key requirement of the Haizum program was to fit in Tiperyn and Kaya's medium airlifters. In its airlift configuration, the Haizum has a footprint of 11.3 metres long by 3.16 metres tall by 2.35 metres wide. It accomplishes this by depressing its gun into a recess in the cab/engine compartment roof, deflating the tires via the, manually removing the outriggers (if length is an issue), and lowering the suspension to the minimum ground clearance. Daiamondeu claims that when the outriggers are not removed, the Haizum can be made ready to fire within three minutes in an air transportable configuration. This minimized profile allows one Haizum and cargo to be carried by a or KIA Parsifala, and two to be carried by Ares Albatross. However, it can not be transported by the Pandur tactical airlifter.

Networking
Since 2019, Tiperyner and Kayan versions of the Haizum have been updated to be integrated into the Battle Team Complex or Stridplakt—an integrated battle management and joint fire control system. This integration allows for the gun crews, fire directors, and forward observers to have complete situational awareness within the combined arms team. This system allows for battery and battalion fire coordinators to quickly and seamlessly pull artillery targetting data from partnered maneuver forces, adjacent units, and targetting pods on rotary and fixed wing aviation. As the system was jointly developed by Tiperyn and Kaya, artillery units from either country can be as integrated with the other in terms of targetting and situational awareness as they would be with their own forces.

Operational history
The first combat deployment of the Haizum was in 2014, when 5. Battalion, 62nd Artillery Regiment (Aeromobile)—the first unit equipped—deployed a battery to Nasiria for eight months. The next year, Tiperyn deployed the Haizum-equipped 3. Battalion, 8th Artillery Regiment to Santa Magdalena as a replacement for the Fleet Expeditionary's 5th Intervention Group's artillery battalion which had been continuously deployed since the start of the 2014 surge. During that deployment, one Haizum was completely lost after striking an anti-tank mine. The Haizum made its first multi-battalion deployment in 2020, when the Tiperyner 4. Battalion, 8th Artillery Regiment; Battery Group, 90th Continental Contingency Regiment; and the Kayan 1. Battalion, 1st Jade Serpent Cannon Regiment were deployed to Insennia as an NSC corps artillery brigade. In 2023, the Tiperyner Admiralty Board stated that the first deployment of Haizums to Selengeria would be when 1/20th Force Cannon Detachment (one of three towed cannon battalions that rotates through the 4th Marine Forces' forward deployment to Selengeria) is re-equipped with them in 2024.

Summary table
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 *  Austrasia
 *  Kaya - In service as Gun Carriage 452. Kaya initially ordered 234 Haizums, delivered between 2014 and 2025. Nine battalions make up the bulk of the artillery in Cannon Regiments subordinate to the Jade Serpent and Redhorn Banner Armies, which are wheeled mechanized infantry formations. One battalion acts as a heavy follow-on artillery capability for the airmobile Morning Star Banner Army. An additional 18 act as training pieces and spares. No additional orders were announced as of 2023.
 *  Ringerike - Adopted as a lower-cost complement to the Katapult Artillery System to replace towed artillery. They are employed in four line artillery regiments and one training battery.
 *  Sannlibo - Sannlig Land Forces: The SLF introduced 240 systems into service along the reserve divisions.
 *  Theyka - Ngāti Tūmatauenga: 36 systems ordered as part of the reorganization of the artillery. They form the armies mechanized artillery element, and are one of the three fundamental systems of the new Armored Brigade.
 *  Tiperyn - In service as Kanoneferager 4.5T «Hazjum». Tiperyn initially ordered 405 Haizums for the Realm Guard (15 battalions), 54 for the Fleet Expeditionary (3 battalions), 50 for joint operational float, and 27 for training. These are to be delivered from 2014 to 2026. A second order was made in 2023 for about 207 additional platforms with a projected delivery date of 2028. This will provide an additional 7 battalions to the Fleet Expeditionary and 3 battalions to the Realm Guard.