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千葉灯標（千葉）2034年04月20日の10分毎の潮の高低差を確認できます。
また1日の潮の高低差が1番大きい（潮の流れが大きい）時間に「最大潮位差」と明記してます。

時刻	潮位	高低差	各ポイント
4/20 00:00	48.7	↑1.5
4/20 00:10	50.8	↑2.1
4/20 00:20	53.5	↑2.7
4/20 00:30	56.7	↑3.2
4/20 00:40	60.5	↑3.8
4/20 00:50	64.7	↑4.2
4/20 01:00	69.4	↑4.7
4/20 01:10	74.5	↑5.1
4/20 01:20	80.0	↑5.5
4/20 01:30	85.7	↑5.7
4/20 01:40	91.8	↑6.1
4/20 01:50	98.0	↑6.2
4/20 02:00	104.4	↑6.4
4/20 02:10	110.8	↑6.4
4/20 02:20	117.4	↑6.6
4/20 02:30	123.9	↑6.5
4/20 02:40	130.5	↑6.6
4/20 02:50	136.9	↑6.4
4/20 03:00	143.2	↑6.3
4/20 03:10	149.4	↑6.2
4/20 03:20	155.3	↑5.9
4/20 03:30	161.1	↑5.8
4/20 03:40	166.5	↑5.4
4/20 03:50	171.6	↑5.1
4/20 04:00	176.4	↑4.8
4/20 04:10	180.8	↑4.4
4/20 04:20	184.7	↑3.9
4/20 04:30	188.2	↑3.5
4/20 04:40	191.2	↑3.0
4/20 04:50	193.8	↑2.6
4/20 05:00	195.7	↑1.9
4/20 05:10	197.1	↑1.4
4/20 05:20	198.0	↑0.9
4/20 05:30	198.2	↑0.2
4/20 05:40	197.8	↓-0.4
4/20 05:50	196.8	↓-1.0
4/20 06:00	195.1	↓-1.7
4/20 06:10	192.8	↓-2.3
4/20 06:20	189.9	↓-2.9
4/20 06:30	186.4	↓-3.5
4/20 06:40	182.2	↓-4.2
4/20 06:50	177.5	↓-4.7
4/20 07:00	172.1	↓-5.4
4/20 07:10	166.3	↓-5.8
4/20 07:20	159.9	↓-6.4
4/20 07:30	153.1	↓-6.8
4/20 07:40	145.9	↓-7.2
4/20 07:50	138.2	↓-7.7
4/20 08:00	130.3	↓-7.9
4/20 08:10	122.1	↓-8.2
4/20 08:20	113.6	↓-8.5
4/20 08:30	105.0	↓-8.6
4/20 08:40	96.3	↓-8.7
4/20 08:50	87.6	↓-8.7
4/20 09:00	78.8	↓-8.8	最大潮位差
4/20 09:10	70.2	↓-8.6
4/20 09:20	61.7	↓-8.5
4/20 09:30	53.4	↓-8.3
4/20 09:40	45.4	↓-8.0
4/20 09:50	37.7	↓-7.7
4/20 10:00	30.4	↓-7.3
4/20 10:10	23.6	↓-6.8
4/20 10:20	17.2	↓-6.4
4/20 10:30	11.4	↓-5.8
4/20 10:40	6.2	↓-5.2
4/20 10:50	1.7	↓-4.5
4/20 11:00	-2.2	↓-3.9
4/20 11:10	-5.4	↓-3.2
4/20 11:20	-7.9	↓-2.5
4/20 11:30	-9.6	↓-1.7
4/20 11:40	-10.5	↓-0.9
4/20 11:50	-10.7	↓-0.2
4/20 12:00	-10.1	↑0.6
4/20 12:10	-8.7	↑1.4
4/20 12:20	-6.6	↑2.1
4/20 12:30	-3.7	↑2.9
4/20 12:40	-0.2	↑3.5
4/20 12:50	4.0	↑4.2
4/20 13:00	8.8	↑4.8
4/20 13:10	14.2	↑5.4
4/20 13:20	20.1	↑5.9
4/20 13:30	26.5	↑6.4
4/20 13:40	33.3	↑6.8
4/20 13:50	40.4	↑7.1
4/20 14:00	47.9	↑7.5
4/20 14:10	55.6	↑7.7
4/20 14:20	63.5	↑7.9
4/20 14:30	71.6	↑8.1
4/20 14:40	79.8	↑8.2
4/20 14:50	87.9	↑8.1
4/20 15:00	96.1	↑8.2
4/20 15:10	104.2	↑8.1
4/20 15:20	112.2	↑8.0
4/20 15:30	120.1	↑7.9
4/20 15:40	127.7	↑7.6
4/20 15:50	135.2	↑7.5
4/20 16:00	142.4	↑7.2
4/20 16:10	149.2	↑6.8
4/20 16:20	155.8	↑6.6
4/20 16:30	161.9	↑6.1
4/20 16:40	167.7	↑5.8
4/20 16:50	173.1	↑5.4
4/20 17:00	178.0	↑4.9
4/20 17:10	182.4	↑4.4
4/20 17:20	186.3	↑3.9
4/20 17:30	189.7	↑3.4
4/20 17:40	192.6	↑2.9
4/20 17:50	194.9	↑2.3
4/20 18:00	196.6	↑1.7
4/20 18:10	197.8	↑1.2
4/20 18:20	198.4	↑0.6
4/20 18:30	198.3	↓-0.1
4/20 18:40	197.7	↓-0.6
4/20 18:50	196.6	↓-1.1
4/20 19:00	194.8	↓-1.8
4/20 19:10	192.5	↓-2.3
4/20 19:20	189.7	↓-2.8
4/20 19:30	186.3	↓-3.4
4/20 19:40	182.5	↓-3.8
4/20 19:50	178.3	↓-4.2
4/20 20:00	173.6	↓-4.7
4/20 20:10	168.5	↓-5.1
4/20 20:20	163.2	↓-5.3
4/20 20:30	157.5	↓-5.7
4/20 20:40	151.6	↓-5.9
4/20 20:50	145.5	↓-6.1
4/20 21:00	139.2	↓-6.3
4/20 21:10	132.9	↓-6.3
4/20 21:20	126.5	↓-6.4
4/20 21:30	120.1	↓-6.4
4/20 21:40	113.8	↓-6.3
4/20 21:50	107.5	↓-6.3
4/20 22:00	101.5	↓-6.0
4/20 22:10	95.6	↓-5.9
4/20 22:20	90.0	↓-5.6
4/20 22:30	84.7	↓-5.3
4/20 22:40	79.8	↓-4.9
4/20 22:50	75.3	↓-4.5
4/20 23:00	71.2	↓-4.1
4/20 23:10	67.5	↓-3.7
4/20 23:20	64.4	↓-3.1
4/20 23:30	61.8	↓-2.6
4/20 23:40	59.8	↓-2.0
4/20 23:50	58.4	↓-1.4