sentences:  While "Isabel" was out of commission, her classification was changed from "destroyer" to "patrol yacht", and, under the Navy's new alphanumeric hull classification system instituted in 1920, her designation changed from SP-521 to PY-10 on 20 July 1920.Meanwhile, the Navy considered how best to employ her in the future.One idea was to convert her into a seaplane tender to support the NC flying boats; another was to send her to Constantinople in the Ottoman Empire to replace the gunboat USS "Scorpion" (PY-3) as station ship there.