The 2017 Sterling Strait Incident was an exchange of fire between a patrol boat of the Kaskivian Navy and a Gewissien patrol vessel on 2 March 2017 in the Sterling Strait.
Two Kaskivian sailors were wounded, one seriously, and both vessels were damaged. The Kaskivian prime minister, Elena Fiori, ordered the navy and the coast guard to muster at Treviglio-na-Stepi and demanded an apology and compensation. The Gewissien boat broke off the action under a white flag and returned to port, and the crisis was effectively over within a week. No apology was ever issued. The exchange became an issue in the 2018 Kaskivian general election, where the opposition led by Vera Donini accused Fiori’s government of having incited it.
Background
Gewiss lies about thirty kilometres offshore from the Kaskivian port of Treviglio, across a strait that is fog-bound for much of the year. Since the 1970s the Gewissien government has claimed a maritime exclusion zone extending approximately four kilometres from its coast, marked by buoys and patrolled by the Ministry of Electromagnetic Purity’s harbour service. The claim has never been recognised by Kaskiv, by Kruhlstutt, or by any other coastal state, and foreign charts mark the whole strait as open water.
The Kaskivian Navy is small and at the time was not well-funded. Its eastern squadron, based at Treviglio, consists of a handful of fast patrol boats and two elderly corvettes, and it is equipped for sovereignty patrols rather than for sustained operations. Fisheries, customs and search-and-rescue work are left to the Kaskivian Coast Guard, which is the better-funded service and the one most often seen in the strait; naval patrols were, before 2017, infrequent and largely symbolic.
In March 2017 the government of Elena Fiori was in its fifteenth year and had made hostility to Gewiss a fixed element of its rhetoric without committing resources to the dispute.
The incident
On the morning of 2 March 2017 the patrol boat KNS Vorelti left Treviglio on a routine sovereignty patrol, steaming north through fog with visibility of about four hundred metres. At approximately 09:20 lookouts reported a small vessel approaching at speed from the east.
The positions given afterwards differ strongly. The Kaskivian account, supported by the boat’s navigation log, places her 5.4 kilometres from the Gewissien coast and therefore outside the claimed zone. The Gewissien broadcast account placed her at 2.7 kilometres, inside the buoys. Fog and the absence of any agreed evidence mean that neither figure can be checked.
The Gewissien patrol boat — a diesel-engined vessel of a class the state designates WPV, Workers’ Patrol Vessel, numbered 7 — closed to within a few hundred metres and signalled by lamp for the Kaskivian boat to turn east. Vorelti continued on course. WPV-7 then signalled again, received no reply, and opened fire. The first rounds appear to have been aimed ahead of the boat as a warning; at least one struck the bridge, wounding the officer of the watch and a rating.
Vorelti returned fire with her forward gun. The engagement lasted about four minutes, both vessels were hit, and WPV-7 broke off. At approximately 09:58 the Kaskivian crew observed a white flag hoisted aboard the Gewissien boat, which turned east and withdrew toward Port Sterling. Vorelti did not pursue.
The Gewissien patrol service operates without radio and communication is by signal lamp, semaphore and flag hoist. The white flag was understood by the Kaskivian crew as a signal of withdrawal.
Reaction
Fiori addressed the National Assembly on 4 March, describing the firing as “an armed attack on a naval patrol in open water” and announcing that the eastern squadron and the coast guard would muster at Treviglio. Two corvettes, four patrol boats and a number of coast guard cutters assembled over the following three days. She demanded a formal apology, compensation for the wounded, and the abandonment of the exclusion zone, and for the first time raised the possibility of a standing naval patrol of the strait.
The Gewissien response came through the rarely used state radio, monitored by Kaskivian signals intelligence. It asserted that the Kaskivian boat had crossed the buoy line, that the patrol boat had fired only after “repeated warning”, and that no white flag had been flown; the object seen aboard WPV-7 was described as a signal cloth used to denote completion of patrol. The broadcast made no reference to casualties.
The Kaskivian Flame and its leader Rodolfo Corta supported the muster but attacked the government for having allowed the navy to decay, arguing in the Assembly that a single patrol boat had been sent to enforce a claim that required “a squadron nobody has been willing to pay for”.
Resolution
The muster was stood down on 13 March, eleven days after the clash, and Vorelti returned to patrol duties after repairs.
The Nastavak Regional Maritime Arbitrators (NRMA), led by former Kaskivian PM Donato Cereghino, completed an inquiry in July 2017, and found that the firing had been initiated by the Gewissien vessel, that the position of the Kaskivian boat could not be established to the standard required for a legal finding, and that patrols in the strait should in future be escorted.
Aftermath
Julian Sterling succeeded his father on or around 14 April 2017, six weeks after the exchange.
In Kaskiv the incident remained a live political subject. Through 2017 and into the 2018 general election the opposition argued that Fiori had provoked Gewiss with rhetoric she was unable or unwilling to support with force, and that the navy’s condition was a national humiliation. This incident contributed to the atmosphere of incompetence that cost the Kaskivian Change Alliance its majority in 2018, though it was secondary to the gas tariff scandals. Corta continued to make eastern naval funding his signature demand, tabling formal amendments from 2020.