Velocity Obstacles enriching ARPA Marginal CPA a near miss ? - - PowerPoint PPT Presentation

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Jan 12, 2024 188 likes •381 views

Velocity Obstacles enriching ARPA Marginal CPA a near miss ? Willem Barentsz / SPr / eNav_uW'18 2 / 18 Protected zone (similar to aviation) target has zero speed Willem Barentsz / SPr / eNav_uW'18 3 / 18 target w. course & speed CPA

SLIDE 1

Velocity Obstacles

enriching ARPA

SLIDE 2

Willem Barentsz / SPr / eNav_uW'18 2 / 18

Marginal CPA a near miss ?

SLIDE 3

Willem Barentsz / SPr / eNav_uW'18 3 / 18

Protected zone

(similar to aviation)

target has zero speed

SLIDE 4

Willem Barentsz / SPr / eNav_uW'18 4 / 18

target w. course & speed CPA about nill

SLIDE 5

Willem Barentsz / SPr / eNav_uW'18 5 / 18

Manoeuvring Envelope providing solution space

SLIDE 6

Willem Barentsz / SPr / eNav_uW'18 6 / 18

more complex, two ships, no conflict

SLIDE 7

Willem Barentsz / SPr / eNav_uW'18 7 / 18

Same situation solution space problem space

SLIDE 8

Willem Barentsz / SPr / eNav_uW'18 8 / 18

Same situation rectangular manoeuvring envelope

SLIDE 9

Willem Barentsz / SPr / eNav_uW'18 9 / 18

Dimension protected zone 1 derived from interviews

SLIDE 10

Willem Barentsz / SPr / eNav_uW'18 10 / 18

AIS data Vlieland junction

SLIDE 11

Willem Barentsz / SPr / eNav_uW'18 11 / 18

Analysis CPA from AIS footage

SLIDE 12

Willem Barentsz / SPr / eNav_uW'18 12 / 18

805 ships 2-9 sept 2016

SLIDE 13

Willem Barentsz / SPr / eNav_uW'18 13 / 18

Shape and dimension of own ship’s protected zone

 Needs to be flexible, depending on several factors,

a.o.

 Type of ship  Sailing Area  Captains orders

 Idealy, you want to communicate this with the other

ships around (Maritime Cloud preferably )

SLIDE 14

Willem Barentsz / SPr / eNav_uW'18 14 / 18

Anti-stress factor

 Stay out of your neighbour’s protected zone

 because COLREG’s seem not always

adequately applied

 because a complex close quarter situation leads

easily to an accident

SLIDE 15

Willem Barentsz / SPr / eNav_uW'18 15 / 18

Research going on

e.g. How does this effect Situation Awareness?

 RAAK project in maritime safety (16 months left)

 Partners are welcome

 Ba and MSc students doing research projects

 a.o. Maritime Safety, Augmented Reality and

Ecological Interface Design