\begin{table}%t2
\par
\caption{\label{tab2}Slowly drifting structures observed in the 0.8$-$3.0~GHz
frequency range during the March 18, 2008 flare. L and H mean the low and
high frequency boundaries of the drifting structure. Substructures:~FDB -- fast drift bursts, NBC -- narrowband continuum.} 
%\centering
\par
\begin{tabular}{cccc}
 \hline\hline
Time &  Freq. range & Freq. drift & Remarks \\
   (UT)  & (GHz) & (MHz s$^{-1}$) &    \\
 \hline
12:01:14--12:01:43 & 1.90--0.80  & $-$10.0 & L, FDB \\
12:01:14--12:03:24 & 1.55--1.20  & $-$2.7 & H, FDB  \\
12:04:11--12:04:22 & 0.89--0.80  & $-$8.2 & FDB \\
12:04:13--12:04:20 & 1.12--0.97  & $-$21.4 &  FDB \\
12:04:50--12:05:25 & 1.00--0.85  & $-$4.3 &  FDB \\
12:05:10--12:05:50 & 1.20--0.95  & $-$6.2 &  FDB \\
12:06:05--12:06:27 & 1.36--1.00  & $-$16.4 &  FDB \\
12:07:20--12:07:30 & 1.15--0.95  & $-$20.0 &  FDB \\
12:08:29--12:08:52 & 1.45--1.04  & $-$17.8 &  FDB \\
12:15:00--12:22:00 & 1.20--0.80  & $-$0.9 & L, FDB \\
12:15:00--12:26:00 & 1.80--0.80  & $-$1.5 & H, FDB \\
12:15:20--12:18:00 & 2.30--2.00  & $-$1.9 & L, FDB \\
12:15:20--12:18:00 & 3.00--2.50  & $-$3.1 & H, FDB \\
12:23:40--12:25:50 & 2.10--1.90  & $-$1.5 & L, zebra \\
12:23:40--12:25:50 & 2.50--2.00  & $-$3.8 & H, zebra \\
12:26:00--12:34:00 & 1.60--1.00  & $-$0.8 & L, FDB \\
12:26:00--12:34:00 & 2.00--1.50  & $-$0.7 & H, FDB \\
12:38:00--12:50:00 & 1.25--1.20  & $-$0.07 & L, FDB \\
12:38:00--12:50:00 & 1.40--1.30  & $-$0.14 & H, NBC \\
12:55:00--12:56:40 & 1.23--1.15  & $-$0.8 & L, NBC \\
12:55:00--12:56:40 & 1.45--1.23  & $-$2.2 & H, NBC \\
\hline
\end{tabular}
\end{table}