RADIO REPORTING (CALLING-IN) POINTS Traffic Control Centres and Maritime Information System (SICOSENARU). The River Uruguay comprises six zones run from different Control Centres from the Argentinian and Uruguayan Coast Guards in alternating semi-annual shifts. All vessels are required to report to the appropriate Centre when passing designated Reporting Points and on entering/leaving a sector. See Published Maritime Information (IMP Uruguay), Uruguayan Coast Guard, chapter VI, section 2-4 for further details. 
This cell is included in Zones ZULU and YANKEE.
ZULU ZONE: Km 0-33
1st Shift (Jan 1st - Jun 30th): PARANACITO PREFECTURA NAVAL RADIO (L5Z)
2nd Shift (Jul 1st - Dec 31st): NUEVA PALMIRA PREFECTURA RADIO (CWC 31)

YANKEE ZONE: Km 33-153
1st Shift (Jan 1st - Jun 30th): FRAY BENTOS PREFECTURA RADIO (CWC 25)
2nd Shift (Jul 1st - Dec 31st): GUALEGUAYCHÚ PREFECTURA NAVAL RADIO (L8O)