NEWS FLASH:2021 TIDAL PREDICTION TABLE AVAILABLE AT NNHO APAPA AND NNHS PORT HARCOURT; NIGERIAN NAVY LAUNCHES NEW HYDROGRAPHIC SURVEY VESSEL; CDS COMMENDS NAVY OVER INDIGENOUS NAVIGATION CHART; NOW AVAILABLE- OGUNKOBO TO TINCAN CHART NG4401, LAGOS HARBOUR CHART NG2501 AND TRAINING CHARTS OF NIGERIAN WATERS AT NNHO APAPA AND NNHS PORT HARCOURT