首頁 ﹥ 商品介紹 > sailed4seas on collision avoidance > sailed4seas talk 16 mental game of radar lookout
sailed4seas talk 16 mental game of radar lookout
(rule useful in dense traffic area like this as the situation change with very quick heading change)
mental game of radar lookout
Click here 
sailed4seas talk 16 mental game of radar lookout
http://sailed4seas.pixnet.net/blog/po...
Ownship speed is 21 Knots and course is 246.5 degrees at beginning.
The situational awareness is: With three minutes vector length in 21 Knots, this vector is about ten cables distance as above. (skill by knowing three minutes run) Ownship have an overtaken vessel at 6 or 7 cables ahead going to starboard side. (skill by compared this vessel position in 3 Minutes vector length) One container vessel crossing the traffic separation scheme from starboard side, one cargo vessel crossing from Port side and one ferry vessel sailing in different direction ahead. (skill by comparing speed vector direction with general traffic direction)
After 01 minutes exercise time lapsed:
Ownship speed is 18.8 Knots which had reduced from 21 kts by reduce Engine Revolution to 59%. Ownship course is 237.3 from 246.5 degrees at first instance, right now ownship tried to steady on 237 degrees.
The situational awareness is:
Ownship had reduced Engine Output to 59 % for maneuvering. (sighted) Decisive course change from 246 degrees to 237 degrees once ownship understands overtaken vessel course. (sighted) The overtaken vessel at 6 or 7 cables ahead had kept on starboard bow for overtaking. (sighted) One overtaking vessel at port quarter had collision risk with ownship for the collision line is very close. (sighted) One container vessel crossing the traffic separation scheme from starboard side is not sure with three minutes speed vector. (suspect by three minutes speed vector) . One cargo vessel crossing from Port side will be dead ahead after three minutes. (skill by using three minutes vector) One ferry vessel sailing in different direction end-on is unknown to us. (suspect by three minutes vector now) Ownship expect ferry boat course will change sharply near separation line somewhere. (suspect by sighted ferry boat position at separation line now )
The situational awareness by 6 minutes speed vector is unclear (first pair light blue color extended from current ship’s position). Container vessel crossing the traffic separation scheme from starboard side has collision risk with us after 6 minutes. (suspect by comparing 9 minutes speed vector (second pair light blue color line))
Ownship proceed to separation line at this course 237.3 degrees. After 02 minutes exercise time lapsed: Ownship speed is further reduced to 17.1 Knots which had reduced from 21 kts by reduce Engine Revolution to 59%. Ownship course is further to port side at 235.1 degrees from last minutes 237.3 degrees, right now ownship left turn had not stop yet.
The situational awareness is: Ownship had reduced Engine Output to 59 % for maneuvering. (sighted) Small course change from 237 degrees to 235 degrees to avoid overtaken vessel. (sighted) The overtaken vessel at 6 or 7 cables ahead had kept on starboard bow for overtaking. (sighted) One overtaking vessel at port quarter had collision risk with ownship for the collision line is crossed. (sighted) Overtaking vessel is at about the same speed as ownship. (skill by comparing the vector length by divider) One container vessel crossing the traffic separation scheme from starboard side is not sure with three minutes speed vector. (suspect by three minutes speed vector) . One cargo vessel crossing from Port side will be dead ahead after two minutes. (sighted) One ferry vessel sailing in different direction end-on is unknown to us. (suspect by three minutes vector now)
After 03 minutes exercise time lapsed: Ownship speed is further reduced to 16.0 Knots which had reduced from 21 kts by reduce Engine Revolution to 59% in the beginning. Ownship course is further to port side at 230.7 degrees from last minutes 235.1 degrees.
The situational awareness is: It is hard to say ownship keep 60% Engine Output for these situations is good or bad. (suspect) At any doubt, reduce the engine immediately. (rule useful in dense traffic area like this as ownship speed reduced very slowly) Course change three times and course changed from 246 to 231 degrees almost at the rate of 5 degrees per minute. (sighted) Change the course carefully in dense traffic area.
(rule useful in dense traffic area like this as the situation change with very quick heading change)
http://sailed4seas.pixnet.net/blog/po...
Ownship speed is 21 Knots and course is 246.5 degrees at beginning.
The situational awareness is: With three minutes vector length in 21 Knots, this vector is about ten cables distance as above. (skill by knowing three minutes run) Ownship have an overtaken vessel at 6 or 7 cables ahead going to starboard side. (skill by compared this vessel position in 3 Minutes vector length) One container vessel crossing the traffic separation scheme from starboard side, one cargo vessel crossing from Port side and one ferry vessel sailing in different direction ahead. (skill by comparing speed vector direction with general traffic direction)
After 01 minutes exercise time lapsed:
Ownship speed is 18.8 Knots which had reduced from 21 kts by reduce Engine Revolution to 59%. Ownship course is 237.3 from 246.5 degrees at first instance, right now ownship tried to steady on 237 degrees.
The situational awareness is:
Ownship had reduced Engine Output to 59 % for maneuvering. (sighted) Decisive course change from 246 degrees to 237 degrees once ownship understands overtaken vessel course. (sighted) The overtaken vessel at 6 or 7 cables ahead had kept on starboard bow for overtaking. (sighted) One overtaking vessel at port quarter had collision risk with ownship for the collision line is very close. (sighted) One container vessel crossing the traffic separation scheme from starboard side is not sure with three minutes speed vector. (suspect by three minutes speed vector) . One cargo vessel crossing from Port side will be dead ahead after three minutes. (skill by using three minutes vector) One ferry vessel sailing in different direction end-on is unknown to us. (suspect by three minutes vector now) Ownship expect ferry boat course will change sharply near separation line somewhere. (suspect by sighted ferry boat position at separation line now )
The situational awareness by 6 minutes speed vector is unclear (first pair light blue color extended from current ship’s position). Container vessel crossing the traffic separation scheme from starboard side has collision risk with us after 6 minutes. (suspect by comparing 9 minutes speed vector (second pair light blue color line))
Ownship proceed to separation line at this course 237.3 degrees. After 02 minutes exercise time lapsed: Ownship speed is further reduced to 17.1 Knots which had reduced from 21 kts by reduce Engine Revolution to 59%. Ownship course is further to port side at 235.1 degrees from last minutes 237.3 degrees, right now ownship left turn had not stop yet.
The situational awareness is: Ownship had reduced Engine Output to 59 % for maneuvering. (sighted) Small course change from 237 degrees to 235 degrees to avoid overtaken vessel. (sighted) The overtaken vessel at 6 or 7 cables ahead had kept on starboard bow for overtaking. (sighted) One overtaking vessel at port quarter had collision risk with ownship for the collision line is crossed. (sighted) Overtaking vessel is at about the same speed as ownship. (skill by comparing the vector length by divider) One container vessel crossing the traffic separation scheme from starboard side is not sure with three minutes speed vector. (suspect by three minutes speed vector) . One cargo vessel crossing from Port side will be dead ahead after two minutes. (sighted) One ferry vessel sailing in different direction end-on is unknown to us. (suspect by three minutes vector now)
After 03 minutes exercise time lapsed: Ownship speed is further reduced to 16.0 Knots which had reduced from 21 kts by reduce Engine Revolution to 59% in the beginning. Ownship course is further to port side at 230.7 degrees from last minutes 235.1 degrees.
The situational awareness is: It is hard to say ownship keep 60% Engine Output for these situations is good or bad. (suspect) At any doubt, reduce the engine immediately. (rule useful in dense traffic area like this as ownship speed reduced very slowly) Course change three times and course changed from 246 to 231 degrees almost at the rate of 5 degrees per minute. (sighted) Change the course carefully in dense traffic area.
(rule useful in dense traffic area like this as the situation change with very quick heading change)