A controllable Pitot device having a Pitot nozzle configured to pump fluid out of a flow of fluid, the device comprising: a nozzle holder configured to support the Pitot nozzle in pivotable adjustment in angular dispositions, comprising a first angular disposition to pump fluid flowing in a first direction of flow, and a second angular disposition, to pump fluid flowing in a second direction of flow (OPPD), which flows in a direction opposite the first direction of flow, wherein the nozzle holder comprises an unobstructed fluid discharge outlet having a selected angular disposition, and the Pitot nozzle is further configured to pump in compliance with the selected angular disposition of the unobstructed fluid discharge outlet, wherein the Pitot nozzle comprises an immersed ingestion inlet in fluid communication with an uncovered open fluid exit opening of the Pitot nozzle, the unobstructed fluid discharge outlet is oriented in an angular disposition which is independent from the angular disposition of the ingestion inlet, and the Pitot nozzle is further configured and adjusted in angular disposition to provide fluid communication from the fluid ingestion inlet, via the uncovered fluid exit opening, to the unobstructed fluid discharge outlet, characterized in that the Pitot nozzle comprises two aligned diametrically opposed open fluid exit openings, one of which being the uncovered fluid exit opening, and is adjustable in at least one angular disposition in which one open exit opening is uncovered for free passage of fluid therethrough, and wherein the other one open exit opening is covered close to prevent passage of fluid therethrough. a nozzle holder configured to support the Pitot nozzle in pivotable adjustment in angular dispositions, comprising a first angular disposition to pump fluid flowing in a first direction of flow, and a second angular disposition, to pump fluid flowing in a second direction of flow (OPPD), which flows in a direction opposite the first direction of flow, wherein the nozzle holder comprises an unobstructed fluid discharge outlet having a selected angular disposition, and the Pitot nozzle is further configured to pump in compliance with the selected angular disposition of the unobstructed fluid discharge outlet, wherein the Pitot nozzle comprises an immersed ingestion inlet in fluid communication with an uncovered open fluid exit opening of the Pitot nozzle, the unobstructed fluid discharge outlet is oriented in an angular disposition which is independent from the angular disposition of the ingestion inlet, and the Pitot nozzle is further configured and adjusted in angular disposition to provide fluid communication from the fluid ingestion inlet, via the uncovered fluid exit opening, to the unobstructed fluid discharge outlet, characterized in that the Pitot nozzle comprises two aligned diametrically opposed open fluid exit openings, one of which being the uncovered fluid exit opening, and is adjustable in at least one angular disposition in which one open exit opening is uncovered for free passage of fluid therethrough, and wherein the other one open exit opening is covered close to prevent passage of fluid therethrough.