CREATE TABLE table_203_193 (id DECIMAL, "ship name" TEXT, "in service" DECIMAL, "project number" TEXT, "type" TEXT, "class" TEXT, "comments" TEXT)

the vaygach was commissioned for service the same year as which ship ?
SELECT "ship name" FROM table_203_193 WHERE "ship name" <> 'vaygach' AND "in service" = (SELECT "in service" FROM table_203_193 WHERE "ship name" = 'vaygach')
SELECT "ship name" FROM "table_203_193" WHERE "in service" = (SELECT "in service" FROM "table_203_193" WHERE "ship name" = 'vaygach') AND "ship name" <> 'vaygach'