Ziya Kalkavan Kollektif Sirketi was formed in 1947. Its operating companies included Altin Kalkavan Denicilik Ticaret ve Sanayi A.S., formed in 1987; Ercan Denizcilik, formed as Kalkavan Transport Denizcilik Ticaret Sanayi A.S. in 1975 and renamed in 2003; and Cagatay Denizcilik ve Ticaret, formed in 1988. The source says Ercan was no longer used for ship operations.
Keep the explicit scope label independent; no alias or company identity is inferred.