Seldovia Tides April 2025 | Tide Charts & Tables | Cook Inlet, AK

Seldovia Tide Chart for (Tue) April 1, 2025

Seldovia tide chart for Tuesday, April 1, 2025
Seldovia tides for Apr 1st, the sunrise is 7:31am-8:51pm and the tide times are H 4:54am 21'8" L 11:21am -4'6" H 5:45pm 18'7" L 11:28pm 1'1" .

Seldovia Tide Chart for (Wed) April 2, 2025

Seldovia tide chart for Wednesday, April 2, 2025
Seldovia tides for Apr 2nd, the sunrise is 7:28am-8:53pm and the tide times are H 5:34am 20'6" L 12:08pm -3'0" H 6:37pm 16'9" .

Seldovia Tide Chart for (Thu) April 3, 2025

Seldovia tide chart for Thursday, April 3, 2025
Seldovia tides for Apr 3rd, the sunrise is 7:25am-8:56pm and the tide times are L 12:15am 3'3" H 6:19am 18'10" L 1:02pm -0'10" H 7:40pm 14'11" .

Seldovia Tide Chart for (Fri) April 4, 2025

Seldovia tide chart for Friday, April 4, 2025
Seldovia tides for Apr 4th, the sunrise is 7:22am-8:58pm and the tide times are L 1:09am 5'5" H 7:13am 16'10" L 2:09pm 1'2" H 9:02pm 13'7" .

Seldovia Tide Chart for (Sat) April 5, 2025

Seldovia tide chart for Saturday, April 5, 2025
Seldovia tides for Apr 5th, the sunrise is 7:19am-9:00pm and the tide times are L 2:23am 7'1" H 8:27am 15'0" L 3:36pm 2'7" H 10:42pm 13'6" .

Seldovia Tide Chart for (Sun) April 6, 2025

Seldovia tide chart for Sunday, April 6, 2025
Seldovia tides for Apr 6th, the sunrise is 7:16am-9:03pm and the tide times are L 4:06am 7'8" H 10:07am 14'1" L 5:12pm 2'10" .

Seldovia Tide Chart for (Mon) April 7, 2025

Seldovia tide chart for Monday, April 7, 2025
Seldovia tides for Apr 7th, the sunrise is 7:13am-9:05pm and the tide times are H 12:03am 14'5" L 5:46am 6'7" H 11:42am 14'5" L 6:21pm 2'4" .

Seldovia Tide Chart for (Tue) April 8, 2025

Seldovia tide chart for Tuesday, April 8, 2025
Seldovia tides for Apr 8th, the sunrise is 7:10am-9:07pm and the tide times are H 12:56am 15'7" L 6:49am 4'11" H 12:47pm 15'4" L 7:08pm 1'9" .

Seldovia Tide Chart for (Wed) April 9, 2025

Seldovia tide chart for Wednesday, April 9, 2025
Seldovia tides for Apr 9th, the sunrise is 7:07am-9:10pm and the tide times are H 1:34am 16'7" L 7:32am 3'2" H 1:35pm 16'3" L 7:44pm 1'4" .

Seldovia Tide Chart for (Thu) April 10, 2025

Seldovia tide chart for Thursday, April 10, 2025
Seldovia tides for Apr 10th, the sunrise is 7:04am-9:12pm and the tide times are H 2:05am 17'5" L 8:07am 1'7" H 2:13pm 16'11" L 8:14pm 1'0" .

Seldovia Tide Chart for (Fri) April 11, 2025

Seldovia tide chart for Friday, April 11, 2025
Seldovia tides for Apr 11th, the sunrise is 7:01am-9:15pm and the tide times are H 2:30am 18'1" L 8:38am 0'3" H 2:48pm 17'6" L 8:42pm 0'11" .

Seldovia Tide Chart for (Sat) April 12, 2025

Seldovia tide chart for Saturday, April 12, 2025
Seldovia tides for Apr 12th, the sunrise is 6:58am-9:17pm and the tide times are H 2:54am 18'6" L 9:07am -0'9" H 3:21pm 17'9" L 9:10pm 1'1" .

Seldovia Tide Chart for (Sun) April 13, 2025

Seldovia tide chart for Sunday, April 13, 2025
Seldovia tides for Apr 13th, the sunrise is 6:56am-9:19pm and the tide times are H 3:18am 18'10" L 9:36am -1'5" H 3:53pm 17'9" L 9:39pm 1'6" .

Seldovia Tide Chart for (Mon) April 14, 2025

Seldovia tide chart for Monday, April 14, 2025
Seldovia tides for Apr 14th, the sunrise is 6:53am-9:22pm and the tide times are H 3:42am 18'11" L 10:06am -1'7" H 4:26pm 17'5" L 10:09pm 2'2" .

Seldovia Tide Chart for (Tue) April 15, 2025

Seldovia tide chart for Tuesday, April 15, 2025
Seldovia tides for Apr 15th, the sunrise is 6:50am-9:24pm and the tide times are H 4:07am 18'8" L 10:36am -1'4" H 4:59pm 16'9" L 10:39pm 3'1" .

Seldovia Tide Chart for (Wed) April 16, 2025

Seldovia tide chart for Wednesday, April 16, 2025
Seldovia tides for Apr 16th, the sunrise is 6:47am-9:27pm and the tide times are H 4:34am 18'2" L 11:08am -0'7" H 5:36pm 15'9" L 11:11pm 4'3" .

Seldovia Tide Chart for (Thu) April 17, 2025

Seldovia tide chart for Thursday, April 17, 2025
Seldovia tides for Apr 17th, the sunrise is 6:44am-9:29pm and the tide times are H 5:03am 17'5" L 11:43am 0'4" H 6:17pm 14'7" L 11:45pm 5'6" .

Seldovia Tide Chart for (Fri) April 18, 2025

Seldovia tide chart for Friday, April 18, 2025
Seldovia tides for Apr 18th, the sunrise is 6:41am-9:32pm and the tide times are H 5:36am 16'5" L 12:23pm 1'7" H 7:07pm 13'4" .

Seldovia Tide Chart for (Sat) April 19, 2025

Seldovia tide chart for Saturday, April 19, 2025
Seldovia tides for Apr 19th, the sunrise is 6:38am-9:34pm and the tide times are L 12:27am 6'9" H 6:17am 15'4" L 1:16pm 2'8" H 8:15pm 12'6" .

Seldovia Tide Chart for (Sun) April 20, 2025

Seldovia tide chart for Sunday, April 20, 2025
Seldovia tides for Apr 20th, the sunrise is 6:36am-9:37pm and the tide times are L 1:28am 7'10" H 7:15am 14'2" L 2:28pm 3'6" H 9:42pm 12'5" .

Seldovia Tide Chart for (Mon) April 21, 2025

Seldovia tide chart for Monday, April 21, 2025
Seldovia tides for Apr 21st, the sunrise is 6:33am-9:39pm and the tide times are L 2:56am 8'2" H 8:43am 13'4" L 3:53pm 3'6" H 10:58pm 13'3" .

Seldovia Tide Chart for (Tue) April 22, 2025

Seldovia tide chart for Tuesday, April 22, 2025
Seldovia tides for Apr 22nd, the sunrise is 6:30am-9:41pm and the tide times are L 4:30am 7'2" H 10:21am 13'7" L 5:08pm 2'8" H 11:52pm 14'9" .

Seldovia Tide Chart for (Wed) April 23, 2025

Seldovia tide chart for Wednesday, April 23, 2025
Seldovia tides for Apr 23rd, the sunrise is 6:27am-9:44pm and the tide times are L 5:43am 5'0" H 11:40am 14'9" L 6:05pm 1'7" .

Seldovia Tide Chart for (Thu) April 24, 2025

Seldovia tide chart for Thursday, April 24, 2025
Seldovia tides for Apr 24th, the sunrise is 6:24am-9:46pm and the tide times are H 12:34am 16'5" L 6:37am 2'4" H 12:42pm 16'3" L 6:53pm 0'6" .

Seldovia Tide Chart for (Fri) April 25, 2025

Seldovia tide chart for Friday, April 25, 2025
Seldovia tides for Apr 25th, the sunrise is 6:22am-9:48pm and the tide times are H 1:12am 18'2" L 7:24am -0'5" H 1:36pm 17'9" L 7:37pm -0'3" .

Seldovia Tide Chart for (Sat) April 26, 2025

Seldovia tide chart for Saturday, April 26, 2025
Seldovia tides for Apr 26th, the sunrise is 6:19am-9:51pm and the tide times are H 1:50am 19'10" L 8:08am -2'11" H 2:25pm 18'11" L 8:20pm -0'8" .

Seldovia Tide Chart for (Sun) April 27, 2025

Seldovia tide chart for Sunday, April 27, 2025
Seldovia tides for Apr 27th, the sunrise is 6:16am-9:53pm and the tide times are H 2:28am 21'1" L 8:51am -4'10" H 3:13pm 19'8" L 9:02pm -0'7" .

Seldovia Tide Chart for (Mon) April 28, 2025

Seldovia tide chart for Monday, April 28, 2025
Seldovia tides for Apr 28th, the sunrise is 6:14am-9:56pm and the tide times are H 3:08am 21'10" L 9:35am -5'10" H 4:00pm 19'9" L 9:44pm -0'0" .

Seldovia Tide Chart for (Tue) April 29, 2025

Seldovia tide chart for Tuesday, April 29, 2025
Seldovia tides for Apr 29th, the sunrise is 6:11am-9:58pm and the tide times are H 3:48am 22'0" L 10:19am -5'10" H 4:48pm 19'3" L 10:28pm 0'11" .

Seldovia Tide Chart for (Wed) April 30, 2025

Seldovia tide chart for Wednesday, April 30, 2025
Seldovia tides for Apr 30th, the sunrise is 6:08am-10:01pm and the tide times are H 4:31am 21'4" L 11:05am -4'11" H 5:38pm 18'3" L 11:14pm 2'4" .

Seldovia Tide Calendar | April 2025

Sun Mon Tue Wed Thu Fri Sat
 
 

Restricted days available with membership — details below


Seldovia Tide Table for April 2025

View tide tables in a column-row format below, with a "diff" column to spot large tide height swings—great for anglers. Scroll down for a textual format, ideal for reading or sharing.

- diff Tides diff Tides diff Tides diff Tides diff Sun Moon
4/1 N/A H 21'8" 4:54AM 26'3" L -4'6" 11:21AM 23'1" H 18'7" 5:45PM 17'6" L 1'1" 11:28PM 19'5" 07:31-20:51 07:47-01:46
4/2 19'5" H 20'6" 5:34AM 23'6" L -3'0" 12:08PM 19'9" H 16'9" 6:37PM 13'6" - - - - 07:28-20:53 08:00-03:41
4/3 13'6" L 3'3" 12:15AM 15'7" H 18'10" 6:19AM 19'9" L -0'10" 1:02PM 15'10" H 14'11" 7:40PM 9'6" 07:25-20:56 08:33-05:19
4/4 9'6" L 5'5" 1:09AM 11'5" H 16'10" 7:13AM 15'7" L 1'2" 2:09PM 12'5" H 13'7" 9:02PM 6'5" 07:22-20:58 09:46-06:14
4/5 6'5" L 7'1" 2:23AM 7'10" H 15'0" 8:27AM 12'4" L 2'7" 3:36PM 10'10" H 13'6" 10:42PM 5'10" 07:19-21:00 11:24-06:35
4/6 5'10" L 7'8" 4:06AM 6'5" H 14'1" 10:07AM 11'3" L 2'10" 5:12PM 11'6" - - - - 07:16-21:03 13:04-06:43
4/7 11'6" H 14'5" 12:03AM 7'9" L 6'7" 5:46AM 7'10" H 14'5" 11:42AM 12'1" L 2'4" 6:21PM 13'2" 07:13-21:05 14:40-06:46
4/8 13'2" H 15'7" 12:56AM 10'7" L 4'11" 6:49AM 10'5" H 15'4" 12:47PM 13'6" L 1'9" 7:08PM 14'9" 07:10-21:07 16:09-06:47
4/9 14'9" H 16'7" 1:34AM 13'5" L 3'2" 7:32AM 13'0" H 16'3" 1:35PM 14'10" L 1'4" 7:44PM 16'1" 07:07-21:10 17:34-06:47
4/10 16'1" H 17'5" 2:05AM 15'9" L 1'7" 8:07AM 15'4" H 16'11" 2:13PM 15'10" L 1'0" 8:14PM 17'0" 07:04-21:12 18:56-06:46
4/11 17'0" H 18'1" 2:30AM 17'10" L 0'3" 8:38AM 17'2" H 17'6" 2:48PM 16'6" L 0'11" 8:42PM 17'7" 07:01-21:15 20:17-06:45
4/12 17'7" H 18'6" 2:54AM 19'4" L -0'9" 9:07AM 18'6" H 17'9" 3:21PM 16'8" L 1'1" 9:10PM 17'9" 06:58-21:17 21:40-06:45
4/13 17'9" H 18'10" 3:18AM 20'3" L -1'5" 9:36AM 19'2" H 17'9" 3:53PM 16'3" L 1'6" 9:39PM 17'5" 06:56-21:19 23:06-06:44
4/14 17'5" H 18'11" 3:42AM 20'6" L -1'7" 10:06AM 19'1" H 17'5" 4:26PM 15'3" L 2'2" 10:09PM 16'6" 06:53-21:22 00:00-06:45
4/15 16'6" H 18'8" 4:07AM 20'0" L -1'4" 10:36AM 18'1" H 16'9" 4:59PM 13'8" L 3'1" 10:39PM 15'0" 06:50-21:24 00:35-06:48
4/16 15'0" H 18'2" 4:34AM 18'9" L -0'7" 11:08AM 16'5" H 15'9" 5:36PM 11'6" L 4'3" 11:11PM 13'1" 06:47-21:27 02:08-06:54
4/17 13'1" H 17'5" 5:03AM 17'0" L 0'4" 11:43AM 14'2" H 14'7" 6:17PM 9'0" L 5'6" 11:45PM 10'10" 06:44-21:29 03:37-07:10
4/18 10'10" H 16'5" 5:36AM 14'10" L 1'7" 12:23PM 11'9" H 13'4" 7:07PM 6'6" - - - - 06:41-21:32 04:48-07:50
4/19 6'6" L 6'9" 12:27AM 8'6" H 15'4" 6:17AM 12'7" L 2'8" 1:16PM 9'9" H 12'6" 8:15PM 4'7" 06:38-21:34 05:26-09:05
4/20 4'7" L 7'10" 1:28AM 6'3" H 14'2" 7:15AM 10'8" L 3'6" 2:28PM 8'11" H 12'5" 9:42PM 4'3" 06:36-21:37 05:41-10:41
4/21 4'3" L 8'2" 2:56AM 5'2" H 13'4" 8:43AM 9'10" L 3'6" 3:53PM 9'9" H 13'3" 10:58PM 6'1" 06:33-21:39 05:48-12:23
4/22 6'1" L 7'2" 4:30AM 6'5" H 13'7" 10:21AM 10'11" L 2'8" 5:08PM 12'0" H 14'9" 11:52PM 9'8" 06:30-21:41 05:50-14:06
4/23 9'8" L 5'0" 5:43AM 9'9" H 14'9" 11:40AM 13'2" L 1'7" 6:05PM 14'10" - - - - 06:27-21:44 05:51-15:47
4/24 14'10" H 16'5" 12:34AM 14'1" L 2'4" 6:37AM 13'11" H 16'3" 12:42PM 15'9" L 0'6" 6:53PM 17'8" 06:24-21:46 05:51-17:28
4/25 17'8" H 18'2" 1:12AM 18'8" L -0'5" 7:24AM 18'2" H 17'9" 1:36PM 18'0" L -0'3" 7:37PM 20'1" 06:22-21:48 05:51-19:12
4/26 20'1" H 19'10" 1:50AM 22'9" L -2'11" 8:08AM 21'11" H 18'11" 2:25PM 19'8" L -0'8" 8:20PM 21'10" 06:19-21:51 05:52-21:01
4/27 21'10" H 21'1" 2:28AM 26 L -4'10" 8:51AM 24'6" H 19'8" 3:13PM 20'4" L -0'7" 9:02PM 22'6" 06:16-21:53 05:53-22:56
4/28 22'6" H 21'10" 3:08AM 27'9" L -5'10" 9:35AM 25'8" H 19'9" 4:00PM 19'10" L -0'0" 9:44PM 22'0" 06:14-21:56 05:57-00:00
4/29 22'0" H 22'0" 3:48AM 27'10" L -5'10" 10:19AM 25'2" H 19'3" 4:48PM 18'3" L 0'11" 10:28PM 20'4" 06:11-21:58 06:06-00:56
4/30 20'4" H 21'4" 4:31AM 26'4" L -4'11" 11:05AM 23'2" H 18'3" 5:38PM 15'10" L 2'4" 11:14PM N/A 06:08-22:01 06:29-02:48

Seldovia Textual Tide Table for April 2025


Apr 1st (Tue)
the sunrise is 7:31am-8:51pm and the tide times are H 4:54am 21'8" L 11:21am -4'6" H 5:45pm 18'7" L 11:28pm 1'1" .
Apr 2nd (Wed)
the sunrise is 7:28am-8:53pm and the tide times are H 5:34am 20'6" L 12:08pm -3'0" H 6:37pm 16'9" .
Apr 3rd (Thu)
the sunrise is 7:25am-8:56pm and the tide times are L 12:15am 3'3" H 6:19am 18'10" L 1:02pm -0'10" H 7:40pm 14'11" .
Apr 4th (Fri)
the sunrise is 7:22am-8:58pm and the tide times are L 1:09am 5'5" H 7:13am 16'10" L 2:09pm 1'2" H 9:02pm 13'7" .
Apr 5th (Sat)
the sunrise is 7:19am-9:00pm and the tide times are L 2:23am 7'1" H 8:27am 15'0" L 3:36pm 2'7" H 10:42pm 13'6" .
Apr 6th (Sun)
the sunrise is 7:16am-9:03pm and the tide times are L 4:06am 7'8" H 10:07am 14'1" L 5:12pm 2'10" .
Apr 7th (Mon)
the sunrise is 7:13am-9:05pm and the tide times are H 12:03am 14'5" L 5:46am 6'7" H 11:42am 14'5" L 6:21pm 2'4" .
Apr 8th (Tue)
the sunrise is 7:10am-9:07pm and the tide times are H 12:56am 15'7" L 6:49am 4'11" H 12:47pm 15'4" L 7:08pm 1'9" .
Apr 9th (Wed)
the sunrise is 7:07am-9:10pm and the tide times are H 1:34am 16'7" L 7:32am 3'2" H 1:35pm 16'3" L 7:44pm 1'4" .
Apr 10th (Thu)
the sunrise is 7:04am-9:12pm and the tide times are H 2:05am 17'5" L 8:07am 1'7" H 2:13pm 16'11" L 8:14pm 1'0" .
Apr 11th (Fri)
the sunrise is 7:01am-9:15pm and the tide times are H 2:30am 18'1" L 8:38am 0'3" H 2:48pm 17'6" L 8:42pm 0'11" .
Apr 12th (Sat)
the sunrise is 6:58am-9:17pm and the tide times are H 2:54am 18'6" L 9:07am -0'9" H 3:21pm 17'9" L 9:10pm 1'1" .
Apr 13th (Sun)
the sunrise is 6:56am-9:19pm and the tide times are H 3:18am 18'10" L 9:36am -1'5" H 3:53pm 17'9" L 9:39pm 1'6" .
Apr 14th (Mon)
the sunrise is 6:53am-9:22pm and the tide times are H 3:42am 18'11" L 10:06am -1'7" H 4:26pm 17'5" L 10:09pm 2'2" .
Apr 15th (Tue)
the sunrise is 6:50am-9:24pm and the tide times are H 4:07am 18'8" L 10:36am -1'4" H 4:59pm 16'9" L 10:39pm 3'1" .
Apr 16th (Wed)
the sunrise is 6:47am-9:27pm and the tide times are H 4:34am 18'2" L 11:08am -0'7" H 5:36pm 15'9" L 11:11pm 4'3" .
Apr 17th (Thu)
the sunrise is 6:44am-9:29pm and the tide times are H 5:03am 17'5" L 11:43am 0'4" H 6:17pm 14'7" L 11:45pm 5'6" .
Apr 18th (Fri)
the sunrise is 6:41am-9:32pm and the tide times are H 5:36am 16'5" L 12:23pm 1'7" H 7:07pm 13'4" .
Apr 19th (Sat)
the sunrise is 6:38am-9:34pm and the tide times are L 12:27am 6'9" H 6:17am 15'4" L 1:16pm 2'8" H 8:15pm 12'6" .
Apr 20th (Sun)
the sunrise is 6:36am-9:37pm and the tide times are L 1:28am 7'10" H 7:15am 14'2" L 2:28pm 3'6" H 9:42pm 12'5" .
Apr 21st (Mon)
the sunrise is 6:33am-9:39pm and the tide times are L 2:56am 8'2" H 8:43am 13'4" L 3:53pm 3'6" H 10:58pm 13'3" .
Apr 22nd (Tue)
the sunrise is 6:30am-9:41pm and the tide times are L 4:30am 7'2" H 10:21am 13'7" L 5:08pm 2'8" H 11:52pm 14'9" .
Apr 23rd (Wed)
the sunrise is 6:27am-9:44pm and the tide times are L 5:43am 5'0" H 11:40am 14'9" L 6:05pm 1'7" .
Apr 24th (Thu)
the sunrise is 6:24am-9:46pm and the tide times are H 12:34am 16'5" L 6:37am 2'4" H 12:42pm 16'3" L 6:53pm 0'6" .
Apr 25th (Fri)
the sunrise is 6:22am-9:48pm and the tide times are H 1:12am 18'2" L 7:24am -0'5" H 1:36pm 17'9" L 7:37pm -0'3" .
Apr 26th (Sat)
the sunrise is 6:19am-9:51pm and the tide times are H 1:50am 19'10" L 8:08am -2'11" H 2:25pm 18'11" L 8:20pm -0'8" .
Apr 27th (Sun)
the sunrise is 6:16am-9:53pm and the tide times are H 2:28am 21'1" L 8:51am -4'10" H 3:13pm 19'8" L 9:02pm -0'7" .
Apr 28th (Mon)
the sunrise is 6:14am-9:56pm and the tide times are H 3:08am 21'10" L 9:35am -5'10" H 4:00pm 19'9" L 9:44pm -0'0" .
Apr 29th (Tue)
the sunrise is 6:11am-9:58pm and the tide times are H 3:48am 22'0" L 10:19am -5'10" H 4:48pm 19'3" L 10:28pm 0'11" .
Apr 30th (Wed)
the sunrise is 6:08am-10:01pm and the tide times are H 4:31am 21'4" L 11:05am -4'11" H 5:38pm 18'3" L 11:14pm 2'4" .

Alaska Tides Map

Tides map. Large blue pin with white center = this station. Small blue pin = other tide stations. Red pins = tidepools covered by this tide station.

Prev
Next

Tides.net Members Access | Signup | Login

Chris and Susie, founders of Tides.net since 2002

Tides.net is run by a couple (Chris & Susie) since 2002. Our focus is on coastal users / planners who want fast, clean tide charts and tables for planning and documenting. Sign up for unrestricted tide charts / tables and an ad-free experience. — perfect for frequent beachgoers, anglers, shellfishing, boaters, ecologists, surfers, photographers, and families planning coastal trips and especially for tidepooling.

Sign Up Now

NOAA/NWS Forecast for Seldovia

Last updated: June 6, 2026, 6:14 AM

Land Forecast (AKZ721)

Land forecast currently unavailable

Last updated: June 6, 2026, 6:14 AM

Seldovia (Guide)

Seldovia across from Homer provides excellent halibut and salmon fishing via water taxi or boats with tides improving nearshore bites. The small harbor supports local trips. Beaches and trails add peaceful coastal charm.

ADFG

Alaska Department of Fish and Game with current fishing regulations seasons bag size limits and area specific rules

Alaska State Parks

Alaska State Parks and beaches with coastal camping, day use permits, and tidepool access information

Seldovia Bay Beach Access (Other)

Public beach and shoreline access in Seldovia Bay with areas for walking, beachcombing, shore fishing, and clamming. Offers views of the harbor and Kachemak Bay; low tide exposes mudflats and rocks while strong currents create safety concerns so check tide charts for safe activities.

Seldovia Boat Launch Ramp (Other)

Public boat launch ramp at Seldovia Small Boat Harbor with trailer parking and access to Kachemak Bay. Supports small boats, kayaks, and fishing trips; tidal ranges and currents affect ramp usability so plan around higher tides for safe launches and navigation.

Seldovia Small Boat Harbor (Other)

Public small boat harbor in Seldovia with moorage slips, transient space, fuel, restrooms, and access to Kachemak Bay and Cook Inlet for fishing, crabbing, and small boat trips. City managed with basic facilities; strong tidal currents and variable conditions require caution for safe docking and navigation.