Smallcraft of the GCK

Type 4 72 class Riverine Patrol Boat
Designed at the behest of the Grecka in response to tactical experience acquired during the Voltarvo Intervention of 0-2AF (1922-1924) the 72 class RPB was armored to resist small arms fire and armed with a quartet of turreted 37mm quick firing cannons of army origin, and was designed to provide fire support to infantry operations and support customs and border enforcement operations, specifically with the Tuma River border between the Holy State of Azan and the newly unified GCK in mind.

Entering production in 1926, the 72 class RPB has seen service throughout the dominion of the GCK, ranging from the navigable riverways of the Nordenian Unorganized Territories to the State of Urjou and the Royal Territory of the Maktak and Pongatar Islands. The type was predominantly utilized by the army, although some examples were used by the Grecken as well; given the small size and light anti-surface armament, the navy found minimal value in the type, and instead focused on blue water naval developments.

Beginning in the 10s AF (1930s) the 72 class began to be seen as somewhat deficient given its absence of AA armament, leading to the design and construction of the succeeding 88 class RPB in 16AF (1938). Never-the-less, the 72 class persists as a general support craft throughout the rivers and estuaries of the Greater Confederated Kingdoms.

Type 16 88 class Riverine Patrol Boat
Developed in response to concerns that the older 72 class RPBS were unarmed against aerial threats, the larger 88 class was introduced in 16AF and benefitted considerably from the new Type 16 50mm gun, an automatic dual purpose weapon giving the type considerably greater potential against both air and surface targets than the preceding class's 37mm pieces. Furthermore, the larger size of the boat allowed the 88 class RPB to carry up to a dozen soldiers aboard as well, allowing the type to drop troops just outside of a combat zone and then proceed to provide fire support as they advance upstream.

Both army and navy versions (88-A and 88-N, respectively) feature 20mm anti-aircraft cannons to compliment the larger 50mm gun mounted on the bow, but only army variants feature the 37mm gun position pioneered on the earlier 72 class; naval variants tend to either feature a second 20mm position or a small depth charge rack, giving the type use in close range port defense as an anti-submarine asset.

88 class RPBs tend to have succeeded the 72 class only in regions wherein hostile air-presence can be anticipated, and have not been as heavily deployed in Nordenia: otherwise, the type can essentially be found in the same environments as its older stablemate.

Type 16 100 class Coastal Patrol Boat
The 100 class CPB serves as a jack-of-all-trades small craft for both the Grecka and Grecken; intended by the army to provide fire support for the smaller 88 class RPB, the 100 class comes in two primary configurations, from which considerable variants are derived. Twin-50s, dubbed due to featuring a pair of single barreled automatic 50mm guns for and aft, are almost identical between army and navy service, while Solo-50 variants eliminate the aft gun and replace that with an assortment of equipment options, rendering the 100 class a highly versatile design.

Twin-50 100 classes vary between army and navy service only in terms of the 100-N classes featuring a depth charge rack and assembly on the aft deck, while 100-A variants lack this due to predominantly riverine operations. Inversely, Solo-50 100 classes vary considerably, as the empty aft deck becomes a ripe opportunity for a variety of loadouts; 100-ML boats feature minelaying racks, and 100-MS units, inversely, are equipped with minesweeping facilities, while 100-ASW craft sport enlarged depth-charge launching facilities and the 100-TB design are armed with a pair of torpedo launchers for anti-shipping defense.

Unlike the 72 and 88 classes, the 100 class coastal patrol boat has enough open water capabilities to render it valuable to the navy, and the type has been produced in considerably larger numbers than the earlier RPB designs which preceded it as general purpose harbor support and coastal patrol designs. The army, in turn, has generally received slightly less of the type, preferring the smaller 88 class for its riverine focused attributes.